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.