Lady Gaga -- Ho-Ho-Ho-Hogan Face?

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Here's misunderstood pop princess Lady Gaga at her Madison Square Garden concert in NYC on Tuesday (left) -- and Hulk Hogan's lovely ex -wife Linda Hogan in all her glory two years ago (right).

One is known for wearing outlandish outfits.

We're just sayin'.

Claire Danes Is in 'Shrek'?

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Here's "Terminator 3" star Claire Danes at an event in Paris on Tuesday (left) -- and "Shrek" princess Cameron Diaz back in 2007 (right).

My so-called life.

We're just sayin'.

Former First Lady Gaga?

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Here's a matronly-looking Lady Gaga in Boston on Wednesday (left) -- and former President Bill Clinton's wife Hillary Clinton in 2003 (right).

Only one sang about a "Bad Romance."

We're just sayin'.

Adam Lambert -- Oh Boy!

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Here's glamtastic former "American Idol" runner-up Adam Lambert at a concert in NYC on Tuesday (left) -- and former Culture Club lead singer Boy George back in 2004 (right).

Only one was banned from "Good Morning America" for kissing a man during an award show performance.

We're just sayin'.

Woody Allen Spent Father's Day With His ...

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Um, well, he spent it with Soon-Yi.

Let's just leave it at that.

BP CEO Was on '30 Rock'?

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Here's BP CEO Tony Hayward testiying in Washington, DC on Thursday (left) -- and "30 Rock" and "The Queen" star Michael Sheen back in February (right).

One is a good actor.

We're just sayin'.

James Blunt Is in 'Twilight'?

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Here's pop singer James Blunt at some event in NYC on Tuesday (left) -- and "Twilight" vampire dad/"Nurse Jackie" star Peter Facinelli back in February (right).

You're beautiful.

We're just sayin'.

'NCIS' Star Is Winnie Cooper?

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Here's "NCIS" star Cote de Pablo in Monte Carlo on Thursday (left) -- and Winnie Cooper from "The Wonder Years" aka Danica McKellar at an event last year (right).

Neither wound up with Kevin Arnold.

We're just sayin'.

Miley Cyrus' Long Lost British Twin Surfaces

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Here's some British model/TV star named Bianca Gascoigne at a movie premiere in London on Wednesday (left) -- and the real Miley Cyrus at an event in L.A. recently (right).

Only one of them is 23.

We're just sayin'.

Tilda Swinton Is in La Roux?

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Here's Oscar winner Tilda Swinton at some event recently (left) -- and Elly Jackson, the lead singer of British group La Roux (who sang that song "Bulletproof") in NYC on Wednesday (right).

Ginger spice!

We're just sayin'.

That Kid in 'Glee' Is Richard Simmons?

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Here's Josh Sussman, who plays Jacon Ben Israel on "Glee," at an event in L.A. on Sunday (left) -- and weight loss guru Richard Simmons back in January (right).

We're just sayin'.

Ke$ha Turns Back Time

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Here's baby Gaga pop singer Ke$ha at some event in Tokyo last week (left) -- and pop icon Cher at the Oscars in 1986 (right).

Tik tok, girl.

Miss USA Was on 'Without a Trace'?

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Here's current Miss USA Rima Fakih at an event in NYC last night (left) -- and former "Without a Trace" star Roselyn Sanchez in 2008 (right).

Neither is Pussycat Doll Nicole Scherzinger.

We're just sayin'.

Robert Pattinson Was on '90210'?

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Here's "Twilight" stud Robert Pattinson on the set of his new non-vampire movie in California on Tuesday (left) -- and "Beverly Hills 90210" star Jason Priestley back in 1994 (right).

Both were over 21 when they became famous for playing teens.

We're just sayin'.

Toni Braxton Was on the 'Idol' Finale?

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Here's Janet Jackson rockin' her natural hair on the "American Idol" finale last night (left) -- and Toni Braxton at some point in the early '90s (right).

Neither had a wardrobe malfunction last night.

We're just sayin'.

Elton John -- Weakest Link?

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Here's Elton John wearing an interesting earring at an event in London the other day (left) -- and "Weakest Link" host Anne Robinson back in 2001 (right).

One of them is a Sir.

We're just sayin'.