Kim Kardashian Starting a “Low-Carb” Diet

 Jerritt Clark/

Kim Kardashian is watching her weight.

After a whirlwind trip to NYC to promote her eponymous perfume and fashion line with Bebe, the reality star, 29, Twittered Wednesday, "OK, now that I'm home, I got up early and worked out! Feels good! Also starting a low carb diet!"

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She admits it won't be easy.

"I am NOT good at dieting! But I need to start eating better because its just healthy. I have such a sweet tooth, its gonna be hard," Kim wrote — adding that she's going to "cheat once a week." (This Friday she'll eat "cupcakes!" she posted.)

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"I am doing both now!" Kim said. "I just want 2 eat healthy!"  

Her big sis Kourtney — who gained 40 pounds while pregnant with baby Mason — can't wait to hit the gym with Kim.

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"Happy ur coming home. I need a workout  mate," Kourtney Twittered Tuesday. "Come see ur nephew, he misses u!"

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