Cameron Diaz turns 41 today, and if there's one thing the birthday lady is known for (besides her sex appeal), it's how outspoken she is about being a proud single woman. And she's in good company. Not all women are committed to the institution of marriage. With career success, friendships, travel, or other hobbies taking priority, many women don't have bridal on the brain. Or, perhaps experience has helped some decide traditional relationships just won't work for them. Famous women often make headlines when they say "I don't" to marriage, kids, or other trappings of a conventional happily ever after. To balance out mainstream marriage mania, here are a few of the more articulate quotes from celebrities with alternative views on relationships.