#20. Ellie Goulding - "Lights"

Christopher Polk/Getty Images

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

Photo by Jason Merritt/Getty Images for Billabong

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

(credit: Getty Images)

Photo by EMMANUEL DUNAND/AFP/Getty Images

#17. Kelly Clarkson - "Catch My Breath"

Photo by Kevin Winter/Getty Images

#16. Phillip Phillips - "Home"

Photo by SAUL LOEB/AFP/Getty Images)

#15. Adele - "Skyfall"

Photo by LEON NEAL/AFP/Getty Images

#14. Muse - "Madness"

Photo by DANIEL ROLAND/AFP/Getty Images

#13. Hunter Hayes - "Wanted"

Photo by Kevin Winter/Getty Images

#12. OneRepublic - "Feel Again"

Photo by Andrew H. Walker/Getty Images

#11. Mumford And Sons - "I Will Wait"

Photo by Simone Joyner/Getty Images

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

Photo by Ryan Pierse/Getty Images

#9. Ed Sheeran - "The A Team"

Photo by Samir Hussein/Getty Images

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

(Photo by Bryan Bedder/Getty Images)

Photo by Bryan Bedder/Getty Images

#7. Andy Grammer - "Miss Me"

Photo by Theo Wargo/Getty Images

#6. fun. - "Some Nights"

Photo by DANIEL ROLAND/AFP/Getty Images

#5. Alex Clare - "Too Close"

Photo by Michael Loccisano/Getty Images

#4. Lumineers - "Ho Hey"

Photo by Jason Merritt/Getty Images for Billabong

#3. P!nk - "Try"

Photo by Christopher Polk/Getty Images

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

Photo by Dominik Bindl/Getty Images

#1. Maroon 5 - "One More Night"

Photo by CHRISTOPHER BERKEY/AFP/Getty Images