Victoria Principal Good Genes or Good Docs?

4/26/2009 5:10 AM PDT

Victoria Principal: Good Genes or Good Docs?

In the '80s, Victoria Principal could do no wrong as good girl Pam Ewing on "Dallas" -- and today she's still all right.

Here's the 34-year-old back in 1984 (left) -- and 25 years later, the 59-year-old updated version at an event in Malibu last week (right).

She's a well-oiled machine.