Belinda Carlisle Good Genes or Good Docs?

6/5/2010 4:30 AM PDT BY TMZ STAFF
Belinda Carlisle has got the beat.


Here's the 26-year-old Go-Go's lead singer back in 1985 (left) -- and 25 years later, the 51-year-old at an event in NYC on Wednesday (right).

As far as her secret, our lips are sealed.