Good Genes or Good Docs

New Kids on the Block have got the right stuff.

Here's Danny Wood, Joey McIntyre, Donnie Wahlberg, Jordan Knight and Jonathan Knight during their boy band heyday in 1989 (top) -- and 24 years later, Joey, 40, Danny, 43, Donnie, 43, Jordan, 42, and Jonathan, 44, in NYC recently (bottom).

They're hanging tough.

Here's the then 41-year-old "I Feel For You" singer back in 1994 (left) -- and 19 years later, the Queen of Funk-Soul celebrating her 60th birthday this week (right).

She is not every woman.

Here's the 33-year-old ginger beauty back in 1994 (left) -- and the 52-year-old "Game Change" star last month (right).

The kid is all right.

There's nothing prehistoric about "Jurassic Park" star Jeff Goldblum.

Here's the 33-year-old hipster icon back in 1985 (left) -- and 28 years later, the 60-year-old "Independence Day" star in Beverly Hills this week (right).

He's so fly.

There is something mysterious about how well David Duchovny ages.

Here's the 33-year-old "The X-Files" star back in 1994 (left) -- and 19 years later, the 52-year-old hunk at the premiere of his new movie "Phantom" this week (right).

Californication does the body good.

Steven Spielberg's films aren't the only thing that are timeless.

Here's the 42-year-old Oscar winner back in 1989 (left) -- and 24 years later, the 66-year-old at an award show in Beverly Hills earlier this month (right).

Classic.

It's hard to wrap your head around how well Valerie Harper has aged.

Here's Bethenny Frankel the 36-year-old "Rhoda" star back in 1976 (left) -- and 37 years later, the 73-year-old "Valerie" (which later became "The Hogan Family") star in L.A. this week (right).

She's irreplaceable.

Helena Bonham Carter has never looked better.

Here's the 20-year-old "Harry Potter" star back in 1987 (left) -- and 26 years later, the eclectic 46-year-old in London this week (right).

She's anything but les miserables.

It's no Hollywood secret that Jodie Foster looks fantastic.

Here's the 26-year-old former child star at the Golden Globes in 1989 (left) -- and 24 years later, the 50-year-old two-time Oscar winner at the Globes on Sunday (right).

She's been accused of aging well.

María Rosario Pilar Martínez Molina Baeza is better known as the one and only Charo.

Here's the voluptuous Spanish sensation back in 1975 right before the start of her "Love Boat" days (left) -- and 38 years later at an event in Palm Springs last week (right).

According to IMDB, there is some discrepancy as to whether she was born in 1941 or 1951. If she's 61 or 71, Charo's cuchi-cuchi is still ageless.

Loni Anderson is still a golden girl.

Here's the 33-year-old "WKRP in Cincinnati" blonde back in 1979 (left) -- and 33 years later, the 66-year-old ex- Mrs. Burt Reynolds at an event in Hollywood (right).

Clark Griswold aka Chevy Chase is having the holiday of a lifetime.

Here's the 46-year-old comedian around the time "National Lampoon's Christmas Vacation" came out in 1989 (left) -- and 23 years later, the 69-year-old former "Community" star at an event earlier this year (right).

Hysterical.

Yoko Ono is a firework.

Here's John Lennon's 53-year-old widow back in 1986 (left) -- and 26 years later, the 79-year-old at an event in Berlin this week (right).

Imagine.

Billy Zane is as cool as an iceberg.

Here's the 31-year-old "Titanic" villain back at the movie's premiere in 1997 (left) -- and 15 years later, the still perfectly browed 46-year-old at an event in Chicago this week (right).

He's one smooth fella.

Bono is having a beautiful day.

Here's the 27-year-old U2 front man back in 1987 (left) -- and 25 years later, the 52-year-old humanitarian at an event in Rome this week (right).

Looking Fly.

Daniel Day-Lewis is great at more than just acting.

Here's the 34-year-old two-time Oscar winner back in 1991 (left) -- and 21 years later, the 55-year-old at a screening of his new film "Lincoln" this week (right).

There will be interesting neckwear.