Celebrity Cheaters! From Kristen Stewart to Ashton Kutcher: 11 Stars Who Couldn't Keep It in Their Pants (PHOTOS)

The No Strings Attached star apparently confused fiction with fact and forgot about the strongest attachment of all: marriage. Ashton reportedly cheated on luminous wife Demi Moore with a 24-year-old generic-looking blonde girl in San Diego — and that's not all, folks: The alleged indiscretion took place on the night of his 6-year wedding anniversary!