Who is Justin Bieber Kissing Now?

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As if there weren’t enough reasons to love Justin Bieber, we just found another one — the Biebs is a total mama’s boy!

While outside the Letterman show, where he was promoting his new flick, Never Say Never, Biebs planted a wet one on the richest luckiest woman in the world — his mom, Pattie Mallette.

VIDEO: Justin teaches David Letterman about Twitter!

Note to Pattie — you done good, kid.

Would you date a mama’s boy like Justin? Or would you just date Justin, period? Do you think it’s cute that Justin is so close with his mom? Share your thoughts!