#40. Ke$ha - "Tik Tok"

(Photo by Jim Dyson/Getty Images)

#39. Neon Hitch - "F U Betta"

(Photo by Stephen Lovekin/Getty Images)

#38. Afrojack - "Take Over Control" featuring Eva Simons

(Photo by Jason Merritt/Getty Images)

#37. Rihanna - "S&M"

(Photo by Koki Nagahama/Getty Images)

#36. Gym Class Heroes - "Stereo Hearts" featuring Adam Levine

(Photo by Christopher Polk/Getty Images for Vh1)

#35. LMFAO - "Party Rock Anthem"

(Photo by Kevork Djansezian/Getty Images)

#34. Lupe Fiasco - "The Show Goes On"

(Photo by Kevin Winter/Getty Images)

#33. Big Sean - "Dance (A$$)"

(Photo by Bryan Steffy/Getty Images)

#32. T-Pain - "Turn All The Lights On" featuring Ne-Yo

(Photo by Jag Gundu/Getty Images)

#31. Jay-Z & Kanye West - "Paris"

(Photo by Jamie McCarthy/Getty Images)

#30. Bruno Mars - "It Will Rain"

(Photo by Jamie McCarthy/Getty Images)

#29. David Guetta - "WIthout You" featuring Usher

(Photo by Larry Busacca/Getty Images For The Recording Academy)

#28. J. Cole - "Workout"

(Photo by Joe Murphy/NBAE via Getty Images)

#27. Adele - "Set Fire to the Rain"

(Photo by Gareth Cattermole/Getty Images)

#26. Alexandra Stan - "Mr. Saxobeat"

(Photo by Carlos Alvarez/Getty Images)

#25. Pitbull - "Give Me Everything" featuring Ne-Yo

(photo by David Becker/Getty Images)

#24. Kriko Bangz - "Drank In My Cup"

(Photo by Jordan Strauss/Getty Images for Bud Light)

#23. Carly Rae Jepsen - "Call Me Maybe"

#22. Tyga - "Rack City"

(Photo by David Livingston/Getty Images)

#21. Taylor Swift - "Eyes Open"

(Sandra Mu/Getty Images)

#20. Gotye - "Somebody That I Used To Know"

(Photo by Mark Metcalfe/Getty Images)

#19. LMFAO - "Sexy and I Know It"

(Photo credit should read ADE JOHNSON/AFP/Getty Images)

#18. One Direction - "What Makes You Beautiful"

(Photo by Kevork Djansezian/Getty Images)

#17. Rihanna - "We Found Love" featuring Calvin Harris

(Photo credit should read LEON NEAL/AFP/Getty Images)

#16. Karmin - "Broken Hearted"

(Photo by Chelsea Lauren/Getty Images for Mercedes-Benz Fashion Week)

#15. Flo Rida - "Good Feeling"

(Photo by Bruce Yeung/NBAE via Getty Images)

#14. Justin Bieber - "Boyfriend"

(Photo by Robert Marquardt/Getty Images)

#13. B.o.B - "So Good"

(Photo by Andrew H. Walker/Getty Images)

#12. Drake - "Take Care" featuring Rihanna

(Photo by Michael Buckner/Getty Images for Bing)

#11. Nicki Minaj - "Starships"

(Photo by Brad Barket/Getty Images)

#10. Gym Class Heroes - "Ass Back Home" featuring Neon Hitch

(Photo by Stephen Lovekin/Getty Images)

#9. Wiz Khalifa & Snoop Dogg - "Young, Wild & Free"

(Photo by Michael Buckner/Getty Images)

#8. Flo Rida - "Wild Ones" featuring Sia

(Photo by Garrett Ellwood/NBAE via Getty Images)

#7. Calvin Harris - "Feel So Close"

(Photo by Graham Denholm/Getty Images)

#6. Katy Perry - "Part of Me"

(Andreas Rentz/Getty Images)

#5. Drake - "The Motto" featuring Lil Wayne

(Photo by Theo Wargo/Getty Images for ESPN)

#4. David Guetta - "Turn Me On" featuring Nicki Minaj

(Photo by Jason Merritt/Getty Images)

#3. Kelly Clarkson - "Stronger (What Doesn't Kill You

(Photo by Frazer Harrison/Getty Images for ACM)

#2. The Wanted - "Glad You Came"

(Photo by Carlos Alvarez/Getty Images)

#1. Fun. - "We Are Young" featuring Janelle Monae

(Photo by Charles Eshelman/Getty Images for Spotify)