Brad Pitt, Jennifer Aniston and Angelina Jolie
It's the celebrity love triangle to end all celebrity love triangles. Incredibly, to this day, folks STILL talk all about Brad Pitt, Jennifer Aniston and Angelina Jolie.
Dennis Quaid, Meg Ryan and Russell Crowe
Dennis Quaid and Meg Ryan were married for over a decade and had a kid together. Then, Ryan starred in Proof of Life with Russell Crowe and that was that for the marriage. Ryan, however, later come out and blamed Quaid's previous infidelities for their divorce.
Woody Allen, Mia Farrow and Soon-Yi Previn
Woody Allen was married for 12 years to Mia Farrow when his wife caught him with naked photos of Soon-Yi Previn, her adopted daughter. Allwn and Previn are still together, despite a huge age difference.
Robert Pattinson, Kristen Stewart and Rupert Sanders
Many Twihards still haven't gotten over it. With Robert Pattinson and Kristen Stewart seemingly going strong, the latter was actually caught on camera making out with director Rupert Sanders.
Britney Spears, Kevin Federline and Shar Jackson
Yes, two women sort of fought over Kevin Federline. He was engaged to Shar Jackson prior to becoming a back-up dancer to Britney Spears. Soon afterward, he ended his engagement to the mother of his child and ended up marrying Britney.
Bill Clinton, Hillary Clinton and Monica Lewinsky
The only love triangle listed here to involve a sitting President, his intern, an impeachment hearing and a stained blue dress. Yech!
Chris Brown, Rihanna, Karrueche Tran
Forget Kevin Federline. Two women actually fought over Chris Brown! It took the singer fathering a baby with yet another woman, but it looks as if Tran and Rihanna have finally come to their senses.
Justin Bieber, Orlando Bloom and Miranda Kerr
According to rumors and pretty reliable reports, Bloom actually punched Bieber at a restaurant in Ibiza because the singer flirted (at the very least!) with Kerr, Bloom's ex-wife.
Cameron Diaz, Kate Hudson and Alex Rodriguez
Hudson and Diaz ended up in a bitter feud after the latter pursued a relationship with the scandalous baseball star, who Hudson had dated first.
Hilary Diff, Aaron Carter and Lindsay Lohan
Duff and Carter dated as teenager, only for the relationship to end when Carter allegedly cheated on her in 2003 with Lohan. Carter has since made it clear that he made a giant mistake.
Reese Witherspoon, Ryan Phillippe and Abbie Cornish
Witherspoon and Phillippe had been married with two kids when news broke that the latter slept with Cornish. Shortly afterward, Ryan split from Reese and dated Abbie for a period of time.