Tom Petty Good Genes Or Good Docs?

7/3/2016 7:13 AM PDT

We pledge allegiance to Tom Petty’s good looks.

Here’s a 27-year-old version of the "American Girl" singer with his free falling flowing locks in New York City (left) and 38 years later ... the born and bred American rocker on stage last month (right)

"Oh yeah, all right!"

The question is...