As previously documented, many celebrities have cheated on their husbands, wives, girlfriends or boyfriends.
But did you know that just as many celebrities have been cheated ON?
We know, right? Who would do this to such talented, pretty people?!?
We don't always know the identity of the partners who screwed them over, but here's a look at a number of stars whose significant others chose to screw someone else...
Did Brad Pitt do the deed with Angelina Jolie while married to Jennifer Aniston? We may never know. But he clearly fell for Jolie while filming Mr. and Mrs. Smith and an emotional affair of such magnitude most definitely counts.
Ray J didn't just film himself sticking it to Kim Kardashian on camera. He once admitted to cheating on Kim on her birthday.
Sara Evans was pretty adamant that husband Craig Schelske cheated on her... drank excessively... was verbally and emotionally abusive... and watched pornography in their home. So much so that she dropped out of Dancing with the Stars to deal with the situation.
In 2014, Britney Spears' then-boyfriend David Lucado caught red-handed (red-lipped?) on video kissing another woman.
In 2003, Halle Berry split from her then-husband, Eric Benét, after he confessed to cheating on her. She has been married three times.
Yes, Tony Parker dared to cheat on Eva Longoria. She commented on how it affected her self-confidence in 2012: "It wasn’t about who he chose. I mean, I had moments of, ‘Am I not sexy enough? Am I not pretty enough? Am I not smart enough?'"
Jesse James dared to step out on Bullock in 2010. He apologized, but she still kicked him to the curb.
Jude Law was dumb enough to cheat on Sienna Miller. With his children's nanny (forehead slap!).
Yes, Hugh Grant cheated on THIS! By payign $40 for a blow job from a hooker.
Christie Brinkley has been cheated on by Billy Joel and Peter Cook. We have no idea why. It's not due to her looks.
Pattinson did not find it very funny when photos emerged of Kristen Stewart making out with director Rupert Sanders.
Lamar Odom has admitted to cheating to Khloe Kardashian back when he fell far off the wagon. The two remain legall married.
What was Nick Cannon thinking?!? He's admitted to cheating on Christina Milian multiple times.
Kathie Lee Gifford
Back in 1997, Kathie Lee Gifford's husband Frank Gifford cheated on her with a flight attendant. The couple reconciled and remained together until he died in 2015.
David Duchovny entered rehab for a sex addiction in 2008 after it came out that he cheated on wife Tea Leoni.
Mario Lopez cheated on Ali Landry during his bachelor party in 2004. Dumb move, man. Very dumb.
Eddie Cibrian cheated on Brandi Glanville with waitress, Scheana Marie; and then also with his now-wife, LeAnn Rimes. Makes us sort of feel bad for Brandi.
We'd say we also feel bad for Tori Spelling because Dean McDermott has admitted to past infidelity... but these two continue to exploit that fact for reality show ratings.
Mary Louise-Parker wasn't just cheated on by Billy Crudup. She was cheated on by Billy Crudup while pregnant, and he cheated on the actress with Claire Danes.
How do we know that Arnold Schwarzenegger cheated on Maria Shriver? Because the former fathered a child with his former housekeeper.
In 2006, Reese Witherspoon and Ryan Phillippe filed for divorce amidst rumors that he was cheating on her with Abbie Cornish. He then went on to date Cornish for a number of months.
It's pretty much common knowledge that Ethan Hawke, who was married to Uma Thurman for seven years, put his penis into at least one woman who was not his wife.
Dennis Quaid and Meg Ryan seemed like a happy couple. But they split up after the actress almost definitely cheated on Quaid with Russell Crowe.