Famous for being Backstreet Boy Nick Carter's kid brother, Aaron Carter is now a grown man.
Here's the 12-year-old back in 2000 (left) -- and nine years later, the 21-year-old version in Toronto this weekend (right).
It's amazing what not having your music or acting career takeoff can do for a guy.
Good Genes or Good Docs?
6/22/2009 2:22 PM PDT BY TMZ STAFF
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