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As revealed in exclusive photos by Us Weekly, Kristen Stewart was caught cheating on boyfriend Robert Pattinson with her married Snow White and the Huntsman director Rupert Sanders in July. "This momentary indiscretion has jeopardized the most important thing in my life, the person I love and respect the most, Rob," she said in a statement. "I love him, I love him, I'm so sorry." Sanders also issued a public apology to his wife Liberty Ross, with whom he shares two children.
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Heidi Klum, Seal, Martin Kirsten
After Heidi Klum filed for divorce in April, Seal accused her of cheating with bodyguard Martin Kirsten. "I would have preferred Heidi show a little bit more class and at least wait until we separated first before deciding to fornicate with the help . . ." he told TMZ. His rep later told Us, "[He] was not implying his wife was cheating while they were together, but he was merely pointing out that their separation and divorce were not final and they are still legally married."
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Jason Aldean, Jessica Ussery, Brittany Kerr
Jason Aldean issued a public apology in October after photos of him cozying up to a woman -- American Idol season 11 hopeful Brittany Kerr, and not his wife, Jessica Ussery -- hit the Internet. "The truth is that I screwed up. I had too much to drink, let the party get out of hand and acted inappropriately at a bar," he wrote.
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Emily Maynard, Jef Holm, Matt Leinart
As Us Weekly reported in August, Bachelorette's Emily Maynard was caught exchanging explicit text messages with Oakland Raiders quarterback Matt Leinart, leading to an explosive fight with fiance Jef Holm during a family vacation in South Carolina. Maynard and Holm called off their engagement in October.
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Ben Flajnik, Courtney Robertson
After getting engaged to Courtney Robertson in November, Bachelor star Ben Flajnik stepped out on his bride-to-be with three different women in one weekend in mid-February in San Francisco. Although he denied it, Us Weekly had the photographic proof of Flajnik making out with one woman. Flajnik and Robertson called off their engagement in October.
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Angelea Preston, Eric Brown
Angelea Preston, a former America's Next Top Model contestant, accused her husband, Eric Brown, of cheating on her with a Tweeter in November. "She knows he's married and don't give a s--t," she wrote. "That's what hos do. She's fine being the side, but I'm not fine with it at all." Preston and Brown welcomed their first child together, son Eric Bueno Brown, Jr., in September.
Culled from: http://www.usmagazine.com/celebrity-news/pictures/biggest-celebrity-cheating-scandals-of-2012-2012312/26646
Kristen Stewart, Robert Pattinson, Rupert Sanders