There are so many fabulously fit celebrities out there that it's hard to keep track of who is doing what. We give you the scoop here at That's Fit all week long, but in case you missed anything, we've got it all wrapped up, too. There's practically a bow on for you!

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If there's one celebrity name that pops into my head when I hear the words "stick thin," it's Mary-Kate Olsen. Kate Moss is up there too, but I'm guessing Mary-Kate may be known more for her skinniness than her Full House stardom. Hey, things might be changing, though.

Tabloids are reporting that the normally waif-like Olsen twin has put on a few pounds. This all stems from rumors that Mary-Kate is pregnant. Her rep says she absolutely is not. Apparently, the 22-year-old reveals in her new coffee table book Influence that doesn't even want kids. Maybe after previously battling anorexia, she just wants a few extra pounds. Not a bad idea, I'd say.

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