The Sun tabloid, the big-cat rights activist — who's currently practicing for her big debut as a contestant on "Dancing With the Stars" — has lost 20 pounds since "Tiger King."RELATED: Celebrity weight loss transformations revealedSources told The Sun that Carole, 59, has slimmed down to 165 pounds by eating two meals a day — she follows a vegan diet — and has been exercising seven days a week.The weight loss news was also shared by TMZ, which reported that Carole is riding her bike 10 miles a