The Bachelor star Melissa Rycroft was forced to sit out Monday night's Dancing with the Stars due to a hairline fracture of one of her ribs. Rycroft had topped the leaderboard last week with her Argentine tango, but her mambo for this week was judged on the basis of her rehearsal performance. This year has been brutal for Dancing contestants: Jewel and Nancy O'Dell were injured before the show even began and Steve-O had to sit out a performance when he injured his back several weeks ago. (Photo: WENN)