Justin Bieber's in a singing mood ... and based on what he's singing, he's also in the mood to get some! SUBSCRIBE: http://po.st/TMZSubscribe About TMZ: TMZ has consistently been credited for breaking the biggest stories dominating the entertainment news landscape and changed the way the public gets their news. Regularly referenced by the media, TMZ is one of the most cited entertainment news sources in the world. Subscribe to TMZ on YouTube for breaking celebrity news/ gossip and insight from the newsroom staff (TMZ Chatter & TMZ News), the best clips from TMZ on TV, Raw & Uncut TMZ paparazzi...
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