Celebrities are constantly hooking up and breaking up with each other every day, but we bet you totally didn't know about these secret showbiz pairings:

1. Actor Richard Gere & Supermodel Cindy Crawford (1988)

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Guess this proves being smoking hot is not enough to keep love alive.

2. Baywatch Babe Pamela Anderson & Kid Rock (2006)

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Seeing that her ex was Tommy Lee, we consider this a level up!

3. Actor Bradley Cooper & Jennifer Esposito (2006)

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The secret ex-wife you didn't know he had.

4. Actress Brooke Shields & Tennis Champ Andre Agassi (1994)

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Here's proof that opposites do attract each other.

5. Actor George Clooney & Talia Balsam (1990)

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At least you know that he's tried the whole marriage thing before!

6. Actress Julia Roberts & Country Singer Lyle Lovett (1993)

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They say love is blind, and here's the proof.

7. Rocker Lenny Kravitz & Actress Lisa Bonet (1989)

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Their union resulted in the birth of Zoe Kravitz.

8. Actress Drew Barrymore & Comedian Tom Green (2000)

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Lucky for Drew, their union only lasted for 163 days.

9. Actors Uma Thurman & Gary Oldman (1992)

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Uma really doesn't have a type.

10. Actor Nic Cage and Lisa Marie Presley (2001)

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The diehard Elvis-fan got to marry and divorce the girl of his dreams.

11. Actress Halle Berry & Atlanta Braves player David Justice (1995)

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This was apparently a very tumultuous relationship.

12. Actors Angelina Jolie & Jonny Lee Miller (1998)

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Miller would be the first of Jolie's many conquests.

13. Actors Jennifer Garner & Scott Foley (2002)

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Wonder what her life would be like if she had kids with this guy instead of Affleck?

14. Actor Tom Cruise & Mimi Rogers (1989)

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You can blame his first wife for introducing him to Scientology.

15. Rock Star Gregg Allman & Singer Cher (1977)

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Shortest. Marriage. Ever. It only lasted for nine days.

16. Performer Madonna & Actor Sean Penn (1986)

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Penn was apparently a real jerk to Madonna.
 
17. Baywatch babe Carmen Electra & Kim-Jong-Un fan Dennis Rodman (1999)

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This couple's height difference wasn't the only thing that got in the way of their love.

18. TV Host Mario Lopez & Doritos girl Ali Landry (2002)

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The couple who wears pink together, doesn't necessarily stay together.

19. Actors Uma Thurman & Ethan Hawke (1998–2005)

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They had three gorgeous kids together, and here's hoping they inherited their mom's good looks.

20. Actors Brad Pitt & Juliette Lewis (1990-1993)

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Lucky Lewis got to date Brad during the height of his hotness!

21. Actress Heather Locklear & Richie Sambora (1994–2007)

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Previously married to Tommy Lee and Richie Sambora, Locklear must really have a thing for rock stars!

22.
Performers Taylor Swift & John Mayer (2010)
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Taylor is still slinging mud towards this notorious playboy who is 11-years her senior.

23. Performers Justin Timberlake & Fergie (1996)
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Fergie was 23 when she nabbed herself an underage 16-year-old who grew up to be Justin Timberlake.

24. Actors Ryan Gosling & Sandra Bullock ( 2002–2003)

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We always knew Bullock was a budding cougar. She's currently rumored to be setting her sights on Chris Evans.