#40. Lady Gaga - "Bad Romance"

(Photo by Jemal Countess/Getty Images)

#39. Rihanna - "S&M"

(Photo by Dave J Hogan/Getty Images)

#38. B.o.B - "Nothin' On You" featuring Bruno Mars

(Photo by Bennett Raglin/Getty Images)

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

(Photo by Chris McKay/Getty Images)

#36. LMFAO - "Party Rock Anthem"

(Photo by Gareth Cattermole/Getty Images)

#35. Lil Wayne - "She Will" featuring Drake

(Photo by Kevin Winter/Getty Images)

#34. Britney Spears - "Til The World Ends"

(Photo by Jason Merritt/Getty Images)

#33. Adele - "Someone Like You"

(Photo by Christopher Polk/Getty Images)

#32. Kanye West - "Heartless"

(Photo by Mark Metcalfe/Getty Images)

#31. Chris Brown - "Look at Me Now"

(Photo by Kevork Djansezian/Getty Images)

#30. Enrique Iglesias - "I Like It" featuring Pitbull

(Photo by Ronald Martinez/Getty Images)

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

(Photo by Carlos Alvarez/Getty Images)

#28. Nicki Minaj - "Super Bass"

Photo By: Larry Busacca/Getty Images

(Photo by Larry Busacca/Getty Images)

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

(Photo by Stephen Lovekin/Getty Images)

#26. Alexandra Stan - "Mr. Saxobeat"

(Photo by Carlos Alvarez/Getty Images)

#25. T-Pain - "5 O'Clock" featuring Wiz Khalifa

(Photo by Kevin Winter/Getty Images)

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

(Photo by Carlos Alvarez/Getty Images)

#23. Dev - "In The Dark"

(Photo by Michael Tullberg/Getty Images)

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

(Photo by Jason Merritt/Getty Images)

#21. Far East Movement - "Like A G6" featuring Cataracs & Dev

(Photo by Kevin Winter/Getty Images)

#20. Maroon 5 - "Moves Like Jagger" featuring Christina Aguilera

(Photo by Christopher Polk/Getty Images for A&M/Octone)

#19. Rihanna - "Talk That Talk" featuring Jay-Z

(Photo by Carlos Alvarez/Getty Images)

#18. Cobra Starship - "You Make Me Feel So" featuring Sabi

(Photo by Michael Buckner/Getty Images for Bing)

#17. LMFAO - "Sorry for Party Rocking"

(Photo by Ian Gavan/Getty Images)

#16. Drake - "Take Care" featuring Rihanna

(Photo by Michael Buckner/Getty Images for Bing)

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

(Photo by Michael Loccisano/Getty Images)

#14. Drake - "Headlines"

(Photo by Bruce Bennett/Getty Images)

#13. David Guetta - "Without You" featuring Usher

(Photo by Stephen Lovekin/Getty Images)

#12. Wiz Khalifa & Snoop Dogg - "Young, Wild & Free" featuring Bruno Mars

(Photo by Mnet Asian Music Awards via Getty Images)

#11. Pitbull - "International Love" featuring Chris Brown

(Photo by Carlos Alvarez/Getty Images)

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

(Photo by Kevork Djansezian/Getty Images)

#9. Gym Class Heroes - "Back Home"

(Photo by Slaven Vlasic/Getty Images)

#8. Flo Rida - "Good Feeling"

(Photo by Kevin Winter/Getty Images)

#7. Bruno Mars - "It Will Rain"

(Photo by Ian Gavan/Getty Images)

#6. Katy Perry - "The One That Got Away"

(Photo by Jeff Bottari/Getty Images)

#5. J. Cole - "Workout"

(Photo by Astrid Stawiarz/Getty Images)

#4. Jay-Z & Kanye West - "In Paris"

(Photo by Jamie McCarthy/Getty Images)

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

(Photo by Neilson Barnard/Getty Images for Park City Live)

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

(Photo by Mark Davis/Getty Images)

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

(Photo by Kevin Winter/Getty Images)