Radio / American Top 40
The AT40 logo used from 1984-1995.
"Radio plays 'em, record stores sell 'em, Billboard ranks 'em, and AT40 counts 'em down."

American Top 40 is a weekly, long-running (1970-1995, Un-Cancelled in 1998) syndicated radio program, originally hosted by Casey Kasem and currently hosted by Ryan Seacrest, which counts down the forty most popular radio songs (of the week) in the United States.

In addition to playing the week's most popular songs, AT40 frequently included various extra segments. Perhaps most famous among these was Kasem's "Long Distance Dedication": a write-in request from a listener for a particular song, always sentimental in nature, typically directed at a person the listener had not seen in a considerable amount of time (such as a long-distance romantic couple, wife to overseas-based military husband, someone's birth parent on the other side of the country, etc). These particular segments were best remembered for the emotional tone with which Kasem would read the requests on air.

In 1988, Kasem left the show and was replaced by Shadoe Stevens. The change, as well as an altered format, went over poorly, and AT40 was eventually cancelled in 1995. Kasem, though, had in the meantime started up a rival program, Casey's Top 40, and eventually managed to acquire the rights to the American Top 40 title, and the show was Un-Cancelled in 1998. Kasem subsequently retired from the program in 2004; Ryan Seacrest took over hosting duties and helms AT40 to this day, though on an especially busy week for the host/producer/cable network owner/''Today Show'' contributor, a guest host (usually a top-charting artist) will do the show for Seacrest instead.

Song-ranking data was originally derived from Billboard Magazine's "Hot 100" pop/rock singles chart before switching over to Radio and Records (which Kasem had used in his competing program) in 1998. Currently, songs are ranked by data from Mediabase, combined with results of listeners voting for their favorite songs online.

In the mid-1980s, American Top 40 also had a Music Video equivalent: America's Top 10, which was basically the last hour of the radio program — that is, the ten most popular songs on the Billboard chart — translated to television, using clips from the songs' videos, natch. Other similar programs have included:
  • Weekly Top 40, hosted by radio personality Rick Dees;
  • Casey's Top 40, hosted by Kasem himself when he left AT40 in 1988;
  • MTV's (later VH1's) Top 20 Video Countdown.

Apart from first-run airings with Seacrest, Kasem-era reruns of the program, Casey Kasem's American Top 40: The '70s/'80s, are also syndicated weekly.

Now, on with the countdown.

"The tropes from coast to cooooooast!":

  • Audience Participation: You can vote for your favorite song at the show's official website; the results will be factored into the countdown.
    • The "Long Distance Dedication" was added in 1978 to make the show more interactive.
  • Bowdlerization: Chuck Berry's "My Ding-A-Ling" was replaced with a different song in several markets when it reached #1 in 1972, and reruns of those weeks' programs have featured a different song in the #1 position in certain markets.
    • To clarify, the show itself never removed any songs from the countdown because of content concerns, but allowed local stations to do so if they wanted. They also occasionally created their own in-house edited versions of songs, for content or time purposes (or both, sometimes). Most infamously, they edited "Mind Playing Tricks on Me" by Geto Boys down to a little over one minute.
    • For the majority of its run on the show, Kasem didn't announce the title of George Michael's "I Want Your Sex" (though it's unclear whether this was because of a personal objection on his part or a corporate mandate from ABC. He did announce it the first couple weeks and when it fell out of the Top 40).
  • Catch Phrase: "Keep your feet on the ground, and keep reaching for the stars!" in the Kasem years.
    • "AT40 originates in Hollywood", or a variation.
    • "I'm Casey Kasem." A variation, "This is Casey on American Top 40", appeared sporadically.
    • "And the countdown continues/rolls on."
    • "Up ___ big notches to number ___."
    • "Every week, American Top 40 is heard in the 50 states and around the world on great radio stations like...*[lists 3 or 4 affiliate stations]*"
    • "And now we'd like to welcome ___new stations to the AT 40 family...*lists new affiliates*"
  • Dramatic Timpani: A drumroll was used before Kasem announced the week's No. 1 song. A longer one was used on year-end programs, before revealing the year's No. 1 song.
  • Early Installment Weirdness: America's Top 10 started out as a faux newscast, with Casey sitting behind an anchor desk in a suit. After a few shows they switched to a more relaxed style with a sweater-clad Kasem sitting cross-legged in a chair or standing by a monitor.
  • The '80s: When the show was arguably at the height of its power, although it actually started in The '70s.
  • Every Episode Ending:
    • Casey Kasem always ended his episodes saying "Keep your feet on the ground, and keep reaching for the stars." For a brief time in the late-'70s and early-'80s, he would add "...and keep your radio tuned right here", to help keep listeners loyal to the station airing AT40.
    • Shadoe Stevens always ended his episodes with "So until we meet again, this is your best friend, D'Shadoe. Bye bye out there."
  • Invincible Hero: In certain eras when a new song by certain artists debuted you could count on it eventually hitting the Top 5 if not #1. Even if you liked the song you had to hunker down and get ready to hear it every single week for the next few months . Good examples are anything by the Gibb brothers in the late 70s or Michael Jackson in the 80s.
  • Long List / Top Ten List: Forty songs, plus a couple of extras, in four hours (originally three).
  • Long Runner: The program debuted in 1970 and ran uninterrupted for almost 25 years. The current run, dating back to 1998, also qualifies.
  • Montages: A staple of the year-end programs during the 1970s (1974-1978), and then again sporadically in the 1980s; this was simply the No. 1 songs during the past year, often in chronological order. Casey would tease that somewhere included was the No. 1 song of the year except for 1975, when not only were the songs not necessarily in order, but the year's top song (Captain and Tennille's "Love Will Keep Us Together") was not included, which Kasem pointed out shortly before playing the song.
  • New Year Has Come: The special year-end "Top 100" countdowns, spotlighting the top 100 songs of the year.
  • Nothing But Hits: The entire premise of the program. Averted in hindsight by the syndicated reruns, featuring hit songs of their day which have long since dropped off the charts.
    • The Long Distance Dedications were usually songs that had been Top 40 hits, but there were a few exceptions (typically ones with very dramatic stories).
  • Previously On: Starting in February 1979, Kasem played back the top 3 songs from the previous week's show to lead off the countdown. This segment eventually would be shortened to feature just the No. 1 song of last week, and by the end of Kasem's original run (in 1988) and on into the Shadoe Stevens-era, the host would simply announce the songs at and near the top of the charts before beginning the show.
  • Quietly Performing Sister Show: American Country Countdown is radio's longest-running, continuously produced syndicated program, outlasting AT40 (whose current run dates from 1998, the year it was Un-Cancelled after its first run ended in 1995).
  • Rearrange the Song: Some songs would be cut in half to control the show's running time; this typically happened to songs that were on their way down the charts.
  • Series Continuity Error: When "With a Little Luck" by Wings debuted at #17 in 1978, Casey said it was the highest debut in the show's history. Oops! Several songs had already debuted at a higher position, and the record holder was actually "Theme From Shaft" by Isaac Hayes, which debuted at #9 in 1971.
  • Something Completely Different: The special countdown episodes were still countdowns, but the two "Book of Records" specials (1980 and 1989) dropped the countdown format entirely.
  • Spin-Off: American Country Countdown, a country music-version of AT40 that premiered in 1973 and is still going strong today. The current host is Kix Brooks (one half of the long-running duo Brooks & Dunn); before him were original host Don Bowman (who once guest-hosted AT40) and later, Bob Kingsley (the host at the height of ACC's run).
    • Casey's Countdown, later renamed to American Top 20, even later renamed to American Top 10. Hosted by Casey, all three programs were essentially American Top 40 for the Adult Contemporary market. Previously, a similar program, America's Top 10 (also hosted by Casey), had aired from 1980 to 1992; unlike the former shows, AT10 was a music video showcase and aired on television.
  • Spiritual Successor: Casey's Top 40, created the year after Casey left AT40 and running from 1989-1998. The program even used the "Casey's Coast to Coast!" bumper that had been present in AT40.
  • Third-Person Person: Especially in promos, Shadoe Stevens would often refer to himself by his nickname, "D'Shadoe".
  • Vocal Evolution: Casey's vocal tone shifted several times over the years, which he later acknowledged, though he said it wasn't intentional. In the first few years he had a laid-back, vaguely hipster-ish style, then shifted to a warmer, more friendly approach. His late 70s/early 80s persona has been called "Disco Casey": slick, energetic and enthusiastic. After that he settled into a more avuncular and authoritative style.
  • What Happened to the Mouse? and Chuck Cunningham Syndrome: An occasional feature was "Whatever Happened To ... ?" where Casey would profile a one-hit wonder, or early prolific star of the rock era who suddenly disappeared off the charts, quit recording, etc. Casey would simply explain what said artist (or group, as appropriately) had been doing in recent years, if they were involved with current projects, and so forth.
    • One of the most popular "Whatever Happened To ... ?" stories was of The Singing Nun, a Belgian singer christened Jeanine Deckers who recorded the French language-recorded "Dominque" and had a huge No. 1 hit in the United States in late 1963. Casey's stories on Deckers would always explain that The Singing Nun gave all royalties to the convent but later left the Catholic church in the late 1960s, and later the Belgian government made a claim for back taxes to the tune of $63,000 ... more than Deckers could afford, and no documentation existed that she had donated anything to charity. (The common stories are that her attorney failed to document it and/or that the Catholic church had either destroyed all records of it after they and Deckers broke ties, or that they simply did not have any more responsibility for her and did not have the funds.) Updated several times through the years, the final chapter came in 1985 when Casey announced that Deckers had died (of suicide) at age 51.
    • Two entire specials were based on the What Happened to the Mouse? concept one in July 1973 and the other in April 1975 where Casey played the biggest singles by one-hit wonders during the rock era. The 1975 special had a slightly different chart, with a few different songs added and a different No. 1 song.
      • With one of the "Whatever Happened To ..." artists profiled in the original 1973 special, that artist was deleted from the 1975 updated special. It seemed that Janis Ian, whose 1968 hit "Society's Child" was played for the 1973 show, had just released a new single, "At Seventeen," and although it had yet to make the Hot 100, there were already strong vibes about the song. The good feeling was justified: The song became a long-running hit in the summer of '75, eventually peaking at No. 7.
  • Whole Episode Flashback: A 1975 episode, celebrating the show's fifth anniversary, was a rebroadcast of the very first AT40 from July 4, 1970. The only difference was Kasem occasionally inserting a bumper reminding listeners that this was indeed a program from 1970, and pre- and post-show remarks.
  • Writing Around Trademarks: When Kasem started Casey's Top 40 he was able use the same segments that he'd done on AT40 but he couldn't use the same names. So for example, the "Long Distance Dedication" became the "Request & Dedication".
  • Younger and Hipper: There was a major overhaul in this direction after Shadoe Stevens replaced Casey Kasem.

"Keep your feet on the ground, and keep reaching for the stars!"