- Backstreet Boys song "How Did I Fall In Love With You" is about the realization that the singer's friend is one of these.
- A common theme in country music:
- George Strait's "Check Yes or No", which starts out "It started way back in third grade/I used to sit beside Emmy Lou Hayes..." and winds up twenty years later with the two married.
- Clay Walker's "One, Two, I Love You"
- Bryan White's "Rebecca Lynn"
- Trisha Yearwood's "She's in Love with the Boy" is about a girl planning to marry one of her friends: "even if she's gotta run away, she's gonna marry that boy someday."
- Tim McGraw's "Don't Take the Girl"
- Jody And The Kid by Kris Kristofferson tells the story of a boy who is admired and constantly followed around by a younger girl. Flash to decades later when the now grown man and woman are walking down the same paths hand in hand, under the same nickname, "Jody and the Kid" given to them by the town elders.
- "The Search Is Over" by Survivor. The singer is searching for "the one" and finally realizes that it's his lady friend who's been there for him the whole time. A Truth in Television, since writer Jim Peterik based it on a friend of his.
- Pulp's single "Disco 2000" is sung from the perspective of a man with unrequited feelings for his childhood best friend. The song lyrics start by stating the guy and the girl were born the same day, they were raised together by their moms (who even said they could've been sister and brother) but she ends up marrying someone else.
- The song "Todo ha cambiado" ("Everything has changed") by Chilean music group Canal Magdalena deals with a male friend who tries to change his situation, yet fails.
- The song "Doushite Kimi wo Suki ni Natte Shimattandarou" ("Why Did I End Up Falling For You") by DBSK is from the point of view of a childhood friend watching his love get married to another man.
- The video for Empty Rooms by Gary Moore depicts the unlucky variation.
- Adele's very bittersweet "Someone Like You" is all about this, from the point of view of the Unlucky Childhood Friend.
- Flight of the Conchords' "Bus Driver's Song" is narrated by the bus driver, who keeps derailing his tour of the town to talk about Paula, a woman who used to live next door to the driver when they were little. The driver used to think they'd get married one day, but she married someone else.
- "She Hasn't Always Been This Way" by Doc Walker has a guy coming to terms with a sudden crush on his best friend's little sister (also a friend of his) who is now very hot. They're not friends any more, and she won't even talk to him.
- "May" by James Durbin is the story of a very tragic version of this. The two kids grow up and get married, but the title character dies in childbirth and from that point on, the protagonist can't help but see her every time he looks at his daughter.
- The video for Kelly Clarkson's song "My Life Would Suck Without You" shows Kelly's dysfunctional relationship with her boyfriend starting when they both were children.
- Butch Walker has a somewhat creepy take on the Unlucky Childhood Friend in the video for "Mixtape".
- The song ''Naisho no Hanashinote , with lyrics by Supercell has the singer lamenting that her school crush, might have their eyes on someone else, and hopes they will one day realize her feelings for them.
- Neil Sedaka's Happy Birthday Sweet Sixteen has a young man marvel at his now beautiful 16 year old child-hood friend, and how she used to be like a little sister to him.
- Vocaloid Len Kagamine's "Fire Flower", in which he sings to his childhood sweetheart that his love for her is as intense as a firework.
- A homosexual variant seems to occur in the music video for Joey Graceffa's "Don't Wait"; the story begins with one of the two boys saving the other from bullies. After a timeskip, a grown up version of the boy who was rescued saves a man wearing the same necklace as the boy who rescued him, implying that this man and the boy were one and the same. Afterward, they kiss.
- YouTube singer Jayn has a song called "Smoke and Mirrors", which implies that the narrator and her crush were this. Then her crush fell in love with another girl. The narrator proceeds to turn into a Yandere, tries to get her crush to marry her instead, and when he refuses, she kills the other girl (who's implied to already be married to the narrator's crush).
- The Lumineers' song "Flowers in Your Hair" tells a brief story of how the narrator and a girl grew up together, first as innocent kids and later as self-assured teenagers. Apparently, the girl developed feelings for him, and he tells her that he finally loves her back.
- "Where Did You Go To My Lovely?" and "Last of the Breed" by Peter Sarstedt is this story Marie-Claire left her lover for money and power.
- Ian and Ellen of The Plastic E-GullsRight away I knew
We were meant to be together
Since Elementary School, Grade One
- Thomas Rhett's "Life Changes" references this regarding his real-life wife, Lauren:I bought a ring and she said "I do"
But everybody else said, "man, you're twenty-two
"Whatcha trying to prove?"
"Hey why don't you wait?"
'Cause I've been waiting on her since the second grade, yeah
- "Sandpit Girl" by Sammy J is a Deconstructive Parody, sung from the point of view of someone convinced that this is the case with his former childhood friend based on their Childhood Marriage Promise... and consequently feels justified in showing up to and objecting to her marriage to someone else, complete with calling her a "whore" to her face. Except that he actually turned up at the wrong wedding.
- Taylor Swift loves this trope.
- "Mary's Song (Oh, My My My)" begins with the couple meeting at the ages of seven and nine, and ends with them being a Happily Married couple eighty years later.Take me back when our world was one block wide.
I dared you to kiss me and ran when you tried.
Just two kids, you and I...
- "You Belong With Me" implies it in the song, and confirms it in the music video, with the leads living next door to each other and being best friends.Can't you see that I'm the one who understands you?
Been here all along, so why can't you see,
you belong with me?
- "It's Nice to Have a Friend" shows two friends eventually falling in love and getting married.Something gave you the nerve
to touch my hand.
It's nice to have a friend.
- "Mary's Song (Oh, My My My)" begins with the couple meeting at the ages of seven and nine, and ends with them being a Happily Married couple eighty years later.
- bulow's "Two Punks In Love" describes a pair of friends who, having seen each other through difficult childhoods and having a lot of history, end up in love.Even though the years go by/seasons change and flowers dieWe're still walking side by side/I'm still yours and you're still mine
- Diana Ross' "I'm Still Waiting".I remember when
I was five and you were ten, boy
You knew that I was shy
So you teased and made me cry
But I loved you
- Deconstructed by Sonata Arctica with "Shamandalie." The narrator's obsession with his childhood friend leads her to spurn him and ruin the friendship as well, and now he cannot even speak to her as a friend.
- A slightly odd variant in Music/Smokie with their "Living Next Door To Alice", where the protagonist has been mooning over his Childhood Friend Alice for 25 years (which probably makes the protagonist in his early thirties), but it's only when she moves away, that he realises that it's his other female Childhood Friend that he should have been interested in.
Childhood Friend Romance / Music