Justin Bieber turns 21: Pop star dances shirtless to 50 Cent's birthday anthem 'In Da Club'

It’s official! Justin Bieber is 21. “New birthday shot inside,” the pop star tweetedSaturday. “Grateful to be alive!!! Love u!!! 21” While details surrounding how the Biebs celebrated his big 2-1 remain slim, the singer did share a video clip ... http://ift.tt/1wAv9h4