Jewel was set to get down on Dancing With the Stars this season, but a serious case of tendonitis in both knees may mean she's out for before she started. "I really over did it on the rehearsal front!" she writes on her blog. "[My doctor] said I have tendonitis in my knees and that I have to start a course of medicine to try and bring the swelling down. Yuck! … Now I'm just worried I won't even be able to dance!" Jewel was paired with husband husband Ty Murray for the competition, which kicks off on March 6. (Photo: WENN)