Sports Illustrated swimsuit issue cover girl Marisa Miller is a closet fighter - she has a passion for boxing. Despite the threat of ruining her looks, the sassy American stunner loves to get in the ring and scrap. She says, "Sometimes it's fun to just hit something." But Miller stopped one fight after she took a punch to the face - to remind her boxing buddy of what she did for a living. The sexy model adds, "I did get popped a little bit and I kinda got, like, a little bigger lip... I told them, like, I can't show up without a tooth, or anything."