Hard to imagine that the already-svelte Jane Seymour could drop any more weight, but that's exactly what happened during her 2007 DWTS appearance. Jane lost a total of 20 pounds and also toned up, both of which helped to eliminate her chronic back pain. She told TV Guide, "I was 128 before I started, which was heavy for me. That's a good seven or eight pounds heavier than I ever like to be. Now I'm 108. And it's all muscle."