1. "Friday"- Rebecca Black View this video on YouTube ARK Music Factory / Via youtube.com It's Friday, Friday, gotta get down on Friday! 2. "The Final Countdown"- Europe View this video on YouTube Sony BMG Music Entertainment / Via youtube.com The second that melody kicks in, IT WILL NEVER LEAVE YOUR MIND. 3. "Who Let Dogs Out?"- Baha Men View this video on YouTube Artemis Records / Via youtube.com Chances are you only know the chorus, so have fun with that. WHO LET THE DOGS OUT? WHO WHO WHO WHO WHO? 4. "It's A Small World"- Disney View this video on YouTube The Walt Disney Company / Via youtube.com OH THE HORROR. 5. "Call Me Maybe"- Carly Rae Jepsen View this video on YouTube 604 Records Incorporated / Via youtube.com Remember when this was freaking everywhere? Well, now it's in your head. 6. "Barbie Girl"- Aqua View this video on YouTube Universal Music (Denmark) / Via youtube.com Creepy AND catchy. Faaaaantastic. 7. "Nyan Cat" View this video on YouTube Via youtube.com NYAN NYAN NYAN NYAN NYAN NYAN NYAN NYAN x infinity 8. "Mickey"- Toni Basil View this video on YouTube Razor & Tie Recordings / Via youtube.com Hey Mickey, you're so fine, I don't even know the next line (but I will be singing this for the next forever)! 9. "Dragostea Din Tei"- O-Zone View this video on YouTube Ultra Records / Via youtube.com You don't know this song but you know this song. 10. "The Lion Sleeps Tonight"- The Tokens View this video on YouTube RCA / Via youtube.com OooWEEEEEEEEEOOOOOOWEEEEEEEEOOOOOOWEEEEEOOOOOOOaWEEumbumbewayyyyy. 11. "Whoomp (There It Is)"- Tag Team View this video on YouTube Life Records / Via youtube.com Like with 'Who Let The Dogs Out?', you probably only know the chorus, but OH WELL- you'll be humming this for a while! 12. "The Time Warp"- The Rocky Horror Picture Show View this video on YouTube 20th Century Fox / Via youtube.com It's just a jump to the left... 13. "Entrance of the Gladiators"- Julius Fucik View this video on YouTube Via youtube.com The soundtrack of circuses everywhere. 14. And, of course, "Circus Afro," a derivation of "Entrance of the Gladiators." View this video on YouTube Paramount Pictures / Via youtube.com DA DA DA DA DA DA DA DA CIRCUS DA DA DA DA DA DA DA DA AFRO. 15. "Blue (Da Ba Dee)"- Eiffel 65 View this video on YouTube BlissCo Records / Via youtube.com Hands down THE most annoying chorus ever. #winning 16. "Yellow Submarine"- The Beatles View this video on YouTube Parlophone / Via youtube.com I love The Beatles, I really do, but THIS SONG. It's like an earworm, burrowing into your brain. 17. "Pocketful of Sunshine"- Natasha Bedingfield View this video on YouTube Sony BMG Music Entertainment (UK) / Via youtube.com Olive Penderghast pretty much summed it up. 18. "What Does The Fox Say"- Ylvis View this video on YouTube SBS Discovery / Via youtube.com Yea, this song is fucking fantastic. BUT it will ingrain itself into your brain and never leave. 19. "My Humps"- The Black Eyed Peas View this video on YouTube Interscope Records / Via youtube.com The worst thing about having this stuck in your head is you can't even hum/sing it without completely embarassing yourself and alienating those around you. "MY LOVELY LADY LUMPS, CHECK IT- shit. Sorry." 20. "Lollipop"- The Chordettes View this video on YouTube Cadence / Via youtube.com Lollipop lollipop OH lolli lolli lolli lollipop- POP- ba dum dum dum. 21. "Macarena"- Los Del Rio View this video on YouTube RCA / Via youtube.com Mumblemumblemumblemumblemumble EYYYYYYYYYYYY MACARENA! What song you do YOU always get stuck in your head? Let us know in the comments!