The World’s Biggest Celebs Wish Justin Bieber A Happy 18th Birthday

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Our favorite baby-faced crooner Justin Bieber turns 18 today and we're celebrating with the world's biggest celebrities. From George Clooney to Adele to Barack “President of the United States” Obama, we've gotten signed birthday photos from everyone you care about. Oh and that's not all. (But it never is with us, is it?) Every single celebrity pictured agreed to don Justin's signature hairdo for the sake of an absoultely awesome gallery.

So put on your “Baby, Baby, Baby” real loud because we're about to make you feel closer to Bieber than Selena Gomez. ¬†Think of this as our virtual promise ring to you.