Good Genes or Good Docs

Neil Patrick Harris' good looks are center stage!

Here's the then 16-year-old "Doogie Howser, M.D." doctor at a Los Angeles holiday party back in 1989 (left) and 25 years later -- the now 41-year-old Broadway badass leaving a New York City theater late last month (right).

What's up doc?

Courtney Love's look is "mid-century."

Here's the then 31-year-old Kurt Cobain widow and "Hole" singer on stage in 1995 (left) and almost 20 years later -- the now 50-year-old mother of one at a theater in New York City earlier this year (right).

Jon Bon Jovi's American looks are stuck in the '80s!

Here's a 24-year-old teased out version of the "Livin' On A Prayer" singer back in 1986 (left) and 28 years later -- the now 52-year-old father of four at a benefit in New York City earlier this year (right).

Jenny McCarthy's looks have never been let go.

Here's the then 23-year-old "Singled Out" host at the MTV Movie Awards in L.A. back in 1995 (left) and 19 years later -- the now 41-year-old "The View" outcast at an NYC party earlier this year (right).

Hillary Clinton's looks are a facial filibuster!

Here's the then 44-year-old soon-to-be First Lady posing for a photo in Los Angeles back in 1991 (left) and 23 years later -- the now 66-year-old former Secretary of State speaking at an event in New York City earlier this year (right).

Her beauty secrets are classified information!

Ashley and Mary-Kate Olsen's beauty is not going out of style.

Here's the famous "Full House" sisters at a fashion event in New York City shortly after celebrating their 18th birthday back in 2004 (top) and ten years later -- the now 28-year-old fraternal twinsies at another fashion event in New York City (bottom).

Two of a kind.

John Waters' looks are divine.

Here's the then 44-year-old film maker sporting his signature pencil-thin moustache at an east coast film premiere back in 1990 (left) and 24 years later, the now 68-year-old cult classic icon at his book release last week in NYC (right).

"Beauty is looks you can never forget."

Chris' good looks are as solid as a ROCK!

Here's a 26-year-old version of the SNL funny man at a Los Angeles theater back in 1991 (left) and 23 years later -- the now 49-year-old comedy god making an appearance on a TV show in New York City earlier this week (right).

His handsome face is nothing to laugh at.

Martha Stewart's beauty has never been locked up!

Here's a then 48-year-old version (complete with blue contacts) of the farm chic star at a Hollywood movie premiere back in 1989 (left) and 25 years later -- the now brown-eyed 72-year-old media mogul at a party in NYC earlier this year (right).

What's cookin' good lookin'?

There's nothing funny about Jason Alexander's looks!

Here's the the 35-year-old "Seinfeld" star at a comedy benefit back in 1994 (left) and 20 years later, the now 54-year-old father of two at a fancy ball in Beverley Hills earlier this week (right).

Alicia Silverstone is still a total betty!

Here's the 18-year-old version of the uber-cute "Clueless" star at a premiere in Los Angeles back in 1994 (left) -- and 20 years later, the now 37-year-old mother and author at a book signing in New York earlier this month (right).

Bob Saget's looks are nothing to laugh at!

Here's the then 38-year-old "Full House" patriarch at a hockey game in Los Angeles back in 1994 (left) and 20 years later, the foul mouthed 57-year-old father of three at a book event in New York City earlier this month (right).

Leslie Mann she looks good!

Here's the then 24-year-old "Cable Guy" babe at a premiere in Los Angeles back in 1996 (left) and 18 years later, the now 42-year-old mother of two at a movie conference in Las Vegas earlier this year (right).

Julie Bowen's beauty is a modern miracle!

Here's the then 26-year-old babe in the golf comedy "Happy Gilmore" back in 1996 (left) -- and 18 years later, the 43-year-old "Modern Family" mom earlier in the year in Sydney, Australia (right).

Salma Hayek has always kept a lid on her incredibly good looks.

Here's the then 32-year-old "Dogma" actress showing off in a lilac "Blossom" inspired bucket hat at an LA premiere in 1998 (left) and 16 years later -- the now 47-year-old "30 Rock" star looking tough in a black biker cap at a fashion show in Milan earlier this month (right).

Our hats off to her.

Elle Macpherson is a model of genetic superiority.

Here's the then 25-year-old Sports Illustrated cover girl at a New York City event back in 1989 (left) and 25 years later -- the now 49-year-old mother of two at a fashion event in Paris earlier this year (right).

Elle-oh!