All week long, we're busy checking out how the celebrities stay fit. But there are so many stars, and so many tips, that it can be easy to miss one! If you want to make sure you're up to date on your hot celeb fitness scoop, this is your chance. Click on your secret celebrity fitness crush above to find out what he or she was up to this week!

Reese Witherspoon has been looking pretty fantastic lately and while she certainly can attribute some of that to her jogging sessions with boyfriend Jake Gyllenhaal, she's also giving credit to a new workout invented by her personal trainer, Matthew Reyes, called YogaHop.

Reyes explains, "Most people think yoga is all granola and hippies, so I love to explain how YogaHop is not like that. Imagine all the benefits of Hatha Yoga, then add chart music that will have you bouncing into the poses." Reese obviously agrees, as she tries to attend the 90-minute class two or three times a week, occasionally taking Jake along with her.

It's hard for me to picture, but I can imagine how joining the flexibility of practicing yoga with a more upbeat, energetic workout would be fun. Have you ever tried YogaHop, or anything like it? Because, if it's good enough for Reese, I'm thinking it's good enough for me.

Flip through the gallery below for more celebrity fitness secrets.

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