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RADIO DISNEY - Island Def Jam recording artist Justin Bieber joined Radio Disney's Ernie D in studio for his third Take Over and acoustic performance featuring his new songs 'Baby' and 'U Smile' off the recently released 'My World 2.0.' (Photo by Rick Rowell/Disney Channel via Getty Images)

RADIO DISNEY - Island Def Jam recording artist Justin Bieber joined Radio Disney's Ernie D in studio for his third Take Over and acoustic performance featuring his new songs 'Baby' and 'U Smile' off the recently released 'My World 2.0.' (Photo by Rick Rowell/Disney Channel via Getty Images)