#20. Justin Timberlake - "Suit & Tie"

(Photo Credit: Dominik Bindl/Getty Images)

#19. Adele - "Skyfall"

(Photo Credit: Jason Merritt/Getty Images)

#18. Hunter Hayes - "Wanted"

(Photo Credit Alexandra Wyman/Getty Images for Warner Music Group)

#17. P!nk - "Blow Me (One Last Kiss)"

(Photo Credit: Kevin Winter/Getty Images)

#16. Maroon 5 - "One More Night"

(Photo Credit: David Becker/Getty Images)

#15. Taylor Swift - "I Knew You Were Trouble"

(Photo Credit: Matt Kent/Getty Images)

#14. The Script - "Hall of Fame" f/ will.i.am

(Photo Credit: Ryan Pierse/Getty Images)

#13. Alicia Keys - "Girl On Fire"

(Photo Credit: Al Bello/Getty Images)

#12. Imagine Dragon - "It's Time"

(Photo Credit: CBS Radio Houston)

#11. Muse - "Madness"

(Photo Credit: Matt Kent/Getty Images)

#10. Ed Sheeran - "The A Team"

(Photo Credit: Kevork Djansezian/Getty Images)

#9. Of Monsters and Men - "Little Talks"

(Photo Credit: Sandra Mu/Getty Images)

#8. Phillip Phillips - "Home"

(Photo Credit: Olivier Douliery-Pool/Getty Images)

#7. fun. - "Some Nights"

(Photo Credit: Kevork Djansezian/Getty Images)

#6. Maroon 5 - "Daylight"

(Photo Credit: David Becker/Getty Images)

#5. Kelly Clarkson - "Catch My Breath"

(Photo Credit: Ezra Shaw/Getty Images)

#4. P!nk - "Try"

(Photo Credit: ROBYN BECK/AFP/Getty Images)

#3. Lumineers - "Ho Hey"

(Photo Credit: Kevork Djansezian/Getty Images)

#2. Mumford & Sons - "I Will Wait"

(Photo Credit: Matt Kent/Getty Images)

#1. Bruno Mars - "Locked Out Of Heaven"

(Photo Credit: Dominik Bindl/Getty Images)