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

(Photo by Christopher Polk/Getty Images for Clear Channel)

#19. fun. - "Carry On"

(Photo by Kevork Djansezian/Getty Images)

#18. Maroon 5 - "Daylight"

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

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

#17. Alicia Keys - "Girl On Fire"

(Photo by Issac Baldizon/NBAE via Getty Images)

#16. Adele - "Skyfall"

(Photo by Frazer Harrison/Getty Images)

#15. Hunter Hayes - "Wanted"

(Photo by Kevin Winter/Getty Images)

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

(Photo by Matt Kent/Getty Images)

#13. The Script - "Hall Of Fame" f/ will.i.am

(Photo by Ferdy Damman/AFP/Getty Images)

#12. Muse - "Madness"

(Photo credit should read BEN STANSALL/AFP/Getty Images)

#11. fun. - "Some Nights"

(Photo by Kevork Djansezian/Getty Images)

#10. Imagine Dragons - "It's Time"

(Photo by Jason Merritt/Getty Images for Billabong)

#9. Ed Sheeran - "The A Team"

(Photo by Kevork Djansezian/Getty Images)

#8. Maroon 5 - "One More Night"

(Photo by Kevork Djansezian/Getty Images)

#7. Phillip Phillips - "Home"

(Photo by Scott Halleran/Getty Images)

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

(Photo by Sandra Mu/Getty Images)

#5. Kelly Clarkson - "Catch My Breath"

(Photo by Kevork Djansezian/Getty Images)

#4. P!nk - "Try"

(Photo by Getty Images/Getty Images)

#3. Lumineers - "Ho Hey"

(Photo by Kevork Djansezian/Getty Images)

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

(Photo by Kevork Djansezian/Getty Images)

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

(Photo by Dominik Bindl/Getty Images)