Jennifer Aniston: Good Genes or Good Docs?

Aging is definitely a friend of actress Jennifer Aniston.

On the left is a 23-year-old version of the "Friends" actress at a party back in 1992. 24 years later, Jenni -- who celebrated her 47th birthday earlier this week – is pictured on the right, on the red carpet in Los Angeles. We gotta ask: Good Genes or Good Docs?! What do you think?