Don Bluth's adaptation of Thumbelina has a song with a syrupy-sweet melody performed in an equally saccharine tone by Carol Channing, with the following lyrics:
Here comes the bride is a lovely little ditty But marrying for love is a foolish thing to do 'Cause love won't pay the mortgage or put porridge in your bowl Dearie, marry the mole True it's a fact that he's not exactly witty He's blinder than a bat, but at least his eyes are blue His breath may be alarming but he's charming, for a troll Dearie, marry the mole Romeo and Juliet Were very much in love when they were wed They honored every vow and where are they now? THEY'RE DEAD! DEAD! VERY VERY DEAD Poor Thumbelina, your brain's so itty bitty I hate to seem a pest, but I know what's best for you Just think of all the ways that you can decorate a hole Take my advice, I'll bring the rice Dearie, Marry the Mole! Marry the Mole! Marry that Moooole M is for money. O-L-E
Tim Burton is a master of mixing the macabre and the lighthearted, so it's no surprise that the music in his movies is the same. The best example is "Remains of the Day" from Corpse Bride, a swinging jazzy tune about death and murder. Even while you're tapping your feet to the beat, you probably don't miss the extremely dark chorus:
"Die, die, we all pass away, but don't wear a frown, cause it's really ok! You might try to hide, and you might try to pray, but we all end up the remains of the day!"
"The World's Greatest Criminal Mind", from The Great Mouse Detective, is one of Disney's cheeriest villain songs. The most disturbing lyrics?
Even Meaner? You mean it? Worse than the widows and orphans you drowned?
"When your only desire is to dominate the land of the wolves and the squirrels You've got to think with a open mind and learn to detest little girls And everyone knows at the end of a show the villain puts his plan into words Except there won't be a rescue before the credits roll cause I'm gonna be top of the woods!"
"Now the kids will be packed with my BoingoSnax Construction begins in a day And all of the bears will be ruled by the hare As I maniacally plot from my evil lair!" [cue evil laugh]
"Let It Go" from Frozen, an uplifting-sounding song by Elsa about finally accepting her powers... which is also about choosing to live a life in isolation and cut herself off from the world. Ironically enough that's inverted on a meta-level, seeing as by many people it's viewed as an empowerment anthem and has actually encouraged many, which is arguably the opposite of what some dissonance may suggest it means for Elsa. Also of note is that it was originally intended to be a Villain Song before Idina's performance led the writers to completely changing the story, and the song led people to treat it as... well, the exact opposite. Irony at its finest.
"Shiny" veers back in forth in tone between the menacing tones of a Villain Song... and upbeat '70s glam rock. While most of the song consists of Badass Boasts that fit the tone of both halves, Tamatoa's intent to kill and eat the heroes is mostly expressed in the bouncy parts, and the lyrics do not at all sugarcoat this desire. Just look at the way the lyrics swerve...
I'm too shiny Watch me dazzle like a diamond in the rough Strut my stuff, my stuff is so shiny Send your armies but they'll never be enough My shell's too tough Maui man, you can try try try But you can't expect a demigod to beat a decapod (look it up!) You will die die die Now it's time for me to take apart your aching heart
Maui, now it's time to kick your heinie Ever seen someone so shiny? Soak it in 'cause it's the last you'll ever see C'est la vie, mon ami I'm so shiny Now I eat you so prepare your final plea Just for me
The tail-end of "You're Welcome"; Maui's "I Am Great!" Song starts out with a recap of all the awesome things he's done, but near the finish he sings on how he's taking Moana's boat, and then traps her in a cave, while still keeping the upbeat melody.
Hey, it's okay, okay, "You're welcome" (You're welcome!) But come to think of it, I gotta go! Hey, it's you day to say "You're welcome" (You're welcome!) 'Cause I'm gonna need that boat I'm sailing away, away You're welcome (You're welcome!) 'Cause Maui can do everything but float! You're welcome! (You're welcome!) You're welcome! (You're welcome!) You're welcome! And thank you!
The children's movie The Brave Little Toaster contains a song near its end which the other wiki sums up perfectly: "Worthless is sung by the junkyard's broken down cars, each singing a few verses about their life before being smashed and killed by the compactor." However, they fail to mention the upbeat music it's sung to.
"L'il Ark Angel" from Cats Don't Dance starts with Darla singing about the world being destroyed in a flood and people and animals drowning in exactly the same cheerful tone she later sings about the various animals she's rescuing. If you hadn't already realized she'd be the Big Bad of the film from the foreshadowing in the intro, it's hard to miss it after that.
"Batty Rap" from FernGully: The Last Rainforest. It has a fast and springy beat and tune.....with the lyrics being about how Batty was used in animal testing laboratory, with strong implications that he was conscious throughout all the processes. Due to its 'adult' nature, quite a bit of the song was cut from the film, but was left in on the CD.
"The Eye makeup, when inserted rectally, has some effect... Remove the brain cap... If you notice, by dipping the bat in a series of paints... After 600 packs of cigarettes, the animals seem to exhibit some carcinogenic tendencies..." Oh God, I'm bleeding by my genitals!
The tune's single most horrifying line: "As you see, the animals don't really feel pain, THEY JUST GET USED TO IT!!!"
The song "Mother Knows Best" in Tangled is a cheerful, bouncy song where Gothel terrifies Rapunzel by listing off all the "scary and dangerous" things in the outside world and how all of them will happen to Rapunzel if she steps out of the tower. Throughout the song, Gothel is intentionally emotionally abusing Rapunzel by playing with her fears to make her seem like she's the only one in the cruel world Rapunzel could trust.
Coco has one that becomes foreshadowing: Ernesto de la Cruz's rendition of "Remember Me" seems very wrong. The lyrics come from a place of love, true pure love, yet they're being presented with this upbeat melody like it's a frivolous and showoffish love. That's because it's not Ernesto's song, but Hector's. Notice how Hector's portrayal of the song is one that's slow and melancholy, and feels more genuine and heartfelt. It's something that only he was able to write, because it came from his heart. However, with Ernesto, music is a tool for him to achieve fame and nothing more. He has no care for using music as a tool to express his feelings, which is why the only way he could achieve anything was to steal music from somebody who legitimately cared about music: Hector. However, while Ernesto stole the lyrics and melody of the song from Hector, the one thing he couldn't steal was the heart and passion of the song, which is why Ernesto's version is glorified and over the top. Ernesto missed the point of Hector's song, thus making the song feel artificial and soulless, when compared to Hector's version.
Uglydolls has a couple: "The Ugly Truth," a bouncy funk song where Lou points out how "ugly" everyone else is compared to himself, and "All Dolled Up," an upbeat song about changing how you look in order to be like everyone else.
Georgy Girl: the theme is about how the protagonist is insecure but you can't tell it from the outside...but it has a very light, upbeat tune.
The 2005 The Hitchhiker's Guide to the Galaxy film opens with the Guide narrating to us about how on Earth, man was only the third-most intelligent species on the Earth. The second most intelligent species, were in fact dolphins, who curiously enough knew of the impending destruction of the planet Earth. They made many attempts to alert mankind to the impending doom, but most of their communications were misinterpreted as amusing attempts to punch footballs or whistle for tidbits. So they eventually decided to leave Earth by their own means. The last ever dolphin message was misinterpreted as a surprisingly sophisticated attempt to do a double backward somersault through a hoop while whistling the Star-Spangled Banner, but in fact the message was this: "So Long, and Thanks For All The Fish", an upbeat song with these catchy lyrics:
The world's about to be destroyed There's no point getting all annoyed Lie back and let the planet dissolve around you So long, so long, and thanks for all the fish!
Disaster Area's song "Only the End of the World Again" can be heard on the now-rare Hitchhiker's Guide EP (with the rubber duck on the sleeve). It's a heavy rock ballad about a guy who kills his best friend to be with his girlfriend, takes her for a crash in her dad's car, and then makes out with her as the moon explodes for no adequately explored reason.
"That Thing you Do" in the movie of the same name is an upbeat, Beach Boys-esque song about a guy lamenting his girlfriend leaving him.
In story, the songwriter intended for the song to be a slow ballad, but it became the peppy dance hall song it is after the new drummer decided to up the tempo without telling anybody
The opening number for Phantom of the Paradise, "Goodbye Eddie Goodbye," is about a singer who commits suicide in order to promote the sales of his upcoming album. The song is sung in catchy 50's style complete with "ya-ya-ya-yaahs" and the lead singer pantomiming Eddie's death throes.
The end credits song contains a bouncy piano breakdown along with the lyrics "Good for nothing / Bad in bed / Nobody likes you / You're better off dead / Goodbye."
"Tonight I'm Gonna Rock You Tonight" seems to be a fairly straightforward parody of sexually-charged, self-promoting Rock and Roll anthems directed at adoring female fans; until you realize it's talking specifically about pre-pubescent female fans.
At one point in the film, guitarist Nigel Tufnel plays a short piano piece. It's a hauntingly beautiful excerpt from a trilogy he's composing in D-minor, "The saddest of all keys", inspired by his love of Mozart and Bach. The name of this melancholy tune? Lick My Love Pump. Admittedly, his inspiration might have been Mozart's piece named Lick Me In the Ass.
Monty Python's Life of Brian contains the song "Always Look on the Bright Side of Life," with such lyrically dissonant lines as, "always look on the bright side of death," being sung by Brian during his own crucifixion.
Air America has a pair of chinese singers singing America's "Horse with no name" a song about desperate loneliness in an upbeat longue-singer fashion.
In Borat, Borat sings the National Anthem of fictional Kazakhstan to the tune of "The Star-Spangled Banner".
The movie Grumpier Old Men starts with a bouncy song about the singer killing his wife's lover and leaving his corpse for the crows
"I'm gonna kill you just for fun, you rascal you I'm gonna kill you just for fun, you rascal you, (Verse 1) I'm gonna kill you just for fun, the birds can have you when I'm done, (Verse 2) You slept with my wife, now I'm gonna take your life I'm gonna kill you just for fun, you rascal you"
Clown: (singing cheerfully) Hey, kids, it's me! I bet you thought that I was dead! But when I fell over, I just broke my leg and got a hemorrhage in my head!
Lana Del Ray's cover of "Once Upon A Dream" for 2014's Maleficent takes the sweet, happy Disney love song and gives it a creepy new feeling.
One of the songs in the movie Begin Again has a song called "A Step You Can't Take Back". If you listen to the lyrics, it's pretty clear the song is about someone committing suicide, but you wouldn't know it from the upbeat melody.
The 1971 film Taking Off contains a scene in which a young Ingenue-looking girl sings very sincerely and accompanies herself on the lute. The music is charming, restrained and reminiscent of the Elizabethan era. The lyrics, by contrast, are filthy. The Lyrical Dissonance is played up when the word "fuck" is, several times, given classical melismatic treatment. Can be watched here.