How Long Charlie Puth Download 'How Long' on iTunes
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18 Reasons Justin Bieber Could Make His 'Believe' Tour The Best Thing Ever
Will.i.am revealed recently that Justin has penned a new song for his girlfriend's latest album and he surprised fans at the Summertime Ball this year when he introduced Carly Rae Jepsen on stage. Could the next female star to take to the stage be Selena? Could they debut the track on tour? Only time will tell!