Kelly Osbourne certainly has no regrets about signing up to compete on the new season of Dancing With the Stars because she loves what it's doing to her body. "My whole life has changed so much. I've never felt so healthy," the 24-year-old, who has been rehearsing five hours a day for her dancing debut, tells Britain's Closer magazine. "It's so amazing," says Kelly about her 14-pound weight loss. "I've tried so many stupid fad diets to try to lose weight, when all I needed to do was start dancing."