Call all men cheaters if you will, but women aren't too far behind either. If the likes of Tiger Woods, Jesse James, Arnold Schwarzenegger, Brad Pitt, Ryan Phillippe and others strayed the field, well-known actresses and singers also ended long-term relationships or marriages while falling for a new guy. Here's a list of some who were not discreet...
Kristen Stewart
The paparazzi caught Kristen Stewart cheating on Robert Pattinson, her Twilight co-star and long-term lover, with Rupert Saunders, her married director from the film Snow White and the Huntsman.
K-Stew publicly admitted to cheating on R-Patz after incriminating pics were published in Us Weekly. The two did reconcile, but despite her best efforts, wen't their separate ways.
Katharine McPhee
A recent joinee to this club, the pop star was caught kissing a married man, the director of her TV show Smash.
At the time, she was separated from her husband, Nick Cokas and was trying to improve their marriage. That didn't stop her from carrying on with her director. She remains married to Cokas. The two have said that they would continue to work on their relationship.
Kris Jenner
In true Kardashian style, Kris admitted to cheating on her first husband Robert Kardashian with Ryan (believed to be an alias for her lover at the time, Todd Waterman).
"We made love everywhere, all the time. When you're very young, you do a lot of stupid things. The fact that I cheated on my husband is probably one of the biggest regrets of my life", she revealed.
Meg Ryan
This American sweetheart was still married to Dennis Quaid when she had a brief affair with Russell Crowe in 2000.
After the public found out about the affair, Meg divorced, and then continued dating Russell for another year. However, in 2008, the actress said that Dennis was also cheating on her while they were married. Dennis explained that it happened a long time ago and that Meg should stop living in the past.
Madonna
Madonna was still married to Guy Ritchie at the time while carrying on with baseball ace Alex 'A-Rod' Rodriguez.
Though Madge and A-Rod both denied that they were in a relationship, the ex-wife of the athlete claimed to have seen her husband's love letter to Madonna. He allegedly said that the singer was his 'soul mate'. However, despite all this, Guy Ritchie said he enjoyed his marriage with Madonna and that he didn't regret anything.
Diana. Princess of Wales
Diana publicly admitted to a five-year affair with commoner James Hewitt while being married to Prince Charles, who himself was seeing Camilla Parker-Bowles, to who he is married today.
Diana spoke of the affair in 1995, in an interview for the "Panorama" newspaper. A year later (one year before her death), the royal couple divorced. There were also rumours that the princess was seeing two men during the '80s, before Hewitt.
Jennifer Lopez
JLo's second husband Chris Judd's father told the media that she cheated on his son with Ben Affleck. After the nine-month marriage ended, Jennifer started dating Ben.
Later, there were also rumours that she was cheating on Mark Antony with her current boyfriend, Casper Smart. And now there are rumors that she is cheating on Smart with Antony. Anything is possible with this chica.
Whoopi Goldberg
Whoopi cheated and did not feel bad about it at all. She spoke openly about it, but did not specify which of her husbands she was cheating on.
"I did it five or six times. Yes, I had sex while I was married. I've made mistakes. It happens sometimes," she said once.
Melanie Griffith
Melanie Griffith and Antonio Banderas were both married to other people when they met and began a relationship on the set of "Too Much" back in 1995.
Although Griffith and Banderas are still together, there have been rumours that the actor is cheating on his longtime love!
Paris Hilton
According to her ex Nick Carter, Hilton cheated on him with Chad Michael Murray – who was married at the time to Sophia Bush.
To get back at her, the former Backstreet Boy cheated on the heiress with Ashlee Simpson! Hilton has always denied the cheating allegations, but Sophia filed for divorce from Murray shortly after the rumours surfaced.
Tori Spelling
Tori met Dean McDermott hooked up on the set of the TV movie Mind Over Murder. After filming wrapped, they dumped their respective partners - she was married to Charlie Shanian and he was married to Mary Jo Eustace.
They then began a public relationship. Rumor has it that McDermott recently cheated on Spelling with a mystery woman – but those rumours have yet to be confirmed.
Britney Spears
Britney Spears allegedly cheated on Justin Timberlake with choreographer Wade Robson.
Although neither party confirmed the infidelity, Timberlake's video for the song Cry Me A River seemed to lend merit to the story. According to Spears' ex, Jason Alexander, she used to cheat on Timberlake with him as well.
Heidi Klum
The Seal-Heidi fairytale ended when he discovered she had been sleeping with her bodyguard.
"While I didn't expect anything better from him, I would've thought that Heidi would have shown a little more class and at least waited until we separated first, before deciding to fornicate with the help," said Seal in an interview following their separation.
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