Good Genes or Good Docs

Vanessa Williams has got the right stuff.

Here's the 26-year-old back in 1989 (left) -- and 23 years later, the 49-year-old at an event in L.A. (right).

Despite being being forced to relinquish her title, she'll always be Miss America.

Steven Tyler has been rock and rollin' for over 40 years.

Here's the 28-year-old Aerosmith lead singer back in 1976 (left) -- and 36 years later, the 63-year-old in L.A. on Thursday (right).

American idol, indeed.

For your consideration ... Meryl Streep.

Here's the 30-year-old, 17-time Oscar nominee (and two-time winner) back in 1979 (left) -- and the 62-year-old at an event in London recently (right).

She really is the best.

NFL legend Joe Montana has definitely got game.

Here's the 25-year-old four-time Super Bowl champion quarterback in 1981 (left) -- and 30 years later, the 55-year-old a couple of months ago (right).

They don't call him Golden Joe for nothing.

While most of us are hard at work -- Ferris Bueller looks like he has had the last 25 years off!

Here's the 24-year-old hookie playing hunk back in the 1986 movie (left) -- and 26 years later on a a teaser video that surfaced on YouTube (right).

"Life moves pretty fast. If you don't stop and look around once in a while, you could miss it."

All right. All right. All right. Dave Wooderson from "Dazed and Confused" does not age.

Here's the old dude back in the 1993 movie (left) -- and 19 years later in Butch Walker's new music video "Synthesizers" (right).

We get older, he stays the same age.

Despite over 45 years in the business, Dolly Parton still looks brand new.

Here's the 34-year-old Queen of Country back in 1980 (left) -- and nearly 32 years later, the 65-year-old at the Hollywood premiere of her new movie "Joyful Noise" this week (right).

The "9 to 5" star is timeless.

Melanie Griffith proves blondes really do have more, er, fun.

Here's the 30-year-old celebuspawn back in 1987 (left) -- and 25 years later, the 54-year-old at an event in Hollywood this week (right).

Whatever she's doing it's working, girl!

Believe it or not, today is Christmas Eve and Ricky Martin's 40th birthday.

Here's the 23-year-old former "General Hospital" star back in 1994 (left) -- and 17 years later, shot just a few months ago (right).

Apparently, everyone should be livin' la vida loca.

Tom Cruise's mission impossible is aging.

Here's the handsome 30-year-old "Far and Away" star back in 1992 (left) -- and 19 years later, the flawless 49-year-old promoting his new movie "Mission: Impossible -- Ghost Protocol" in London this week (right).

What's his secret?

Jane Fonda is no "Monster-in-Law."

Here's the 48-year-old aerobics wonder back on the cover of one of her VHS workout tapes in 1986 (left) -- and 25 years later, the 73-year-old stretching it out on one of her brand new DVDs (right).

Her body is working "9 to 5."

There is nothing remotely scary about "American Horror Story" hunk Dylan McDermott.

Here's the 32-year-old "Steel Magnolias" star back in 1993 (left) -- and 18 years later, the 50-year-old at an event in L.A. recently (right).

"Practice" makes perfect.

Here's A-list marionette/puppets Kermit the Frog and Miss Piggy back in 1981 (left) -- and 30 years later, at the premiere of their new movie "The Muppets" last week (right).

They are better than ever.

Here's the 36-year-old "Taxi Driver" star Cybill Shepherd back in 1986 (left) -- and 25 years later, the 61-year-old at an event in Beverly Hills on Thursday (right).

She's been moonlighting at the fountain of youth.

Being married to Ashton Kutcher keeps Demi Moore young.

Here's the 20-year-old former "General Hospital" star back in 1982 (left) -- and 29 years later, the 48-year-old in L.A. recently (right).

Charlie's Angel indeed.

"Grease" star Stockard Channing has a lot to sing and dance about.

Here's the 34-year-old as Rizzo back in 1978 (left) -- and 33 years later, the 67-year-old at an event in NYC on Thursday (right).

Ageless is the word.