If hair could talk, it would probably be saying something like "WTF!!!" to these hairdos...
The on-again, off-again couple seems to be on-again. We piled up the pics!
WATCH Rihannas 'Stay' FEATURING Mikky Ekko @02:15
Dizzee Rascal
David Guetta
Selena Gomez
will.i.am
Calvin Harris
Rudimental
Iggy Azalea
30 Seconds to Mars
J. Cole
Pitbull
Nicki Minaj
Michael Bublé
One Direction
Justin Timberlake
Taylor Swift
fun.
Loreen
Bastille
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