Kim Kardashian is known for her delicious rump, but it seems not everyone is basking in its glory. According to sources boyfriend Reggie Bush has been forcing Kim to work out and lose weight.

"He's been pushing her to work out hard," said our source. Sunday, Kardashian was overheard telling a friend at the opening of FUSE nightclub in Nashville that Bush made her run the dunes at Manhattan Beach in California."

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