#20. Maroon 5 - "One More Night"

(Photo by Jason Kempin/Getty Images for VEVO)

#19. Krewella - "Alive"

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

#18. Rihanna - "Pour It Up"

(Photo by Kevork Djansezian/Getty Images)

#17. Bruno Mars - "When I Was Your Man"

(Photo by Bryan Bedder/Getty Images)

#16. Alicia Keys - "Girl On Fire"

(Photo by Issac Baldizon/NBAE via Getty Images)

#15. Justin Timberlake - "Suit & Tie" f/ Jay-Z

(Photo Credit: Matt Kent/Getty Images)

#14. Ne-Yo - "Let Me Love You"

(Photo by Issac Baldizon/NBAE via Getty Images)

#13. Justin Bieber - "Beauty and a Beat" f/ Nicki MInaj

(Photo by Chris McKay/Getty Images for Jingle Ball 2012)

#12. Lumineers - "Ho Hey"

(Photo by Kevork Djansezian/Getty Images)

#11. Miguel - "Adorn"

(Photo by Kevork Djansezian/Getty Images)

#10. Ed Sheeran - "The A Team"

(Photo by Kevork Djansezian/Getty Images)

#9. Pitbull - "Feel This Moment" f/ Christina Aguilera

(Photo Credit: Michael Loccisano/Getty Images)

#8. Maroon 5 - "Daylight"

(Photo by Kevork Djansezian/Getty Images)

#7. Ke$ha - "C'mon"

(Photo by Joe Murphy/NBAE via Getty Images)

#6. Calvin Harris - "Sweet Nothing" f/ Florence Welch

(Photo by Michael Kovac/Getty Images for Clear Channel)

#5. Macklemore & Ryan Lewis - "Thrift Shop" f/ Wanz

(Photo by Graham Denholm/Getty Images)

#4. Swedish House Mafia - "Don't You Worry Child"

(Photo by Michael Loccisano/Getty Images)

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

(Photo by Kevork Djansezian/Getty Images)

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

(photo by Matt Kent/Getty Images)

#1. will.i.am "Scream and Shout" f/ Britney Spears

(Photo by Jason Merritt/Getty Images)