When Jesse James wanted to cheat on Sandra Bullock, he went for the heavily-tattooed possible neo-Nazi named Michelle "Bombshell" McGee. Yep, she's pretty much the exact opposite of Sandy.
Lamar Odom cheated on Khloe Kardashian with Polina. Those Kardashian girls sure know how to pick 'em!
Young SWEARS he had nothing to do with the end of Blake Shelton and Miranda Lambert's marriage - but cheating partners always say that. Hey, dudes can be side-pieces, too.
Whether they're Democrats or Republicans, politicians can all agree on one thing: They love getting some on the side! Rielle made headlines when she cheated with former North Carolina senator and presidential hopeful John Edwards.
Maria Belen Chapur
You may not remember her name, but Maria made headlines back in 2009, when she was identified as the reason that South Carolina Governor Mark Sanford disappeared to Argentina.
When talking famous political affairs, we would be remiss if we didn't mention Mildred Baena - the housekeeper with whom then-governor Arnold Schwarzenegger fathered a love child ... as you can see here.