Lenny Kravitz: Good Genes or Good Docs?!

Posted Jul 12th 2009 1:01AM by TMZ Staff

Lenny Kravitz may party like a rock star ... but you'd never know it.



Here's the 25-year-old singer back in 1989 (left) -- and 20 years later, the 45-year-old version in London last month (right).

Are you gonna go his way?

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