9.)Gotye- "Somebody That I Used To Know" 8.)Justin Bieber- "Boyfriend" 7.)Demi Lovato- "Give Your Heart A Break" 6.)Rita Ora- "How We Do" 5.)Pitbull- "Back In Time" 4.)B.O.B.- "Both Of Us" 3.)One Direction- "One Thing" 2.)Maroon 5- "… more »