In the new ensemble comedy Friends with Kids (one of Megan Fox's first steps to a comeback), lifelong pals decide to have a baby without the attachment of a relationship, which they'd seen go awry between their married friends after having children. Unfortunately, real life isn't like  movies, and having a kid without getting married doesn't guarantee that it will be any easier. There are a number of famous mothers (or mothers who got famous thanks to their A-list baby daddy) who go on single after a not-so-amicable relationship. Just take a look at The 15 Hottest Baby Mamas in Hollywood to see what we mean.