4. Ashton Kutcher  

What's worse than getting caught cheating? How about getting caught cheating with not one, but two girls in a hot tub, as happened with actor Ashton Kutcher? The cherry on top of that illicit sundae? The alleged misdeeds took place on the anniversary of his wedding to Demi Moore. {relatedarticles}Sara Leal has claimed that she indeed slept with the married actor after the hot tub tryst, which took place while he and Moore were going through a rough patch. The couple – who married in 2005 – have since been embroiled in a public and bitter divorce, with sources claiming that Moore is pursuing many of Kutcher's assets.