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Stars' Workout Shout-Outs

Fergie, Kelly Osbourne and more are talking up their favorite fitness tricks and must-do routines

JORDIN SPARKS GETS HER GROOVE ON

The slimmed-down star says finding the right workout was a big part of her weight-loss regimen. "I took up doing Zumba class, which is so much fun. Being able to stand and dance and not realize I'm burning calories and getting cardio in is just the most amazing thing!"