Anna Kournikova participated in the Nautica South Beach Triathlon. Sort of, anyway. She ran a four mile portion as part of a relay team for K-Swiss. She held a very respectable 7:15/mile pace, but she had another goal that took up a good bit of her focus -- raising awareness for St. Jude's Children's Research Hospital. The tennis player regularly incorporates running into her fitness routine, so this was not a huge stretch for her. Some observers say she's lost her curves, but I think she looks fit and healthy.

Mariah Carey is showing up everywhere lately, but there's less of her to see thanks to a lifestyle change and nutrition and fitness coach. She admits she's bummed to give up her comfort foods, like mac 'n cheese, but she's thrilled to be fitting into the same size jeans she wore in 10th grade.

Not only is Britney Spears working out at Bally (she's been there one to three times a day, lately) -- she just might become their newest spokeswoman. You know, if fitness plays a big role in Britney turning her life around, then Bally might be taking a really smart risk. Or not. Only time will tell.

Source