LeAnn RimesThere was a certain something missing from Shape magazine's party Thursday night to honor LeAnn Rimes' third time as their cover girl. That's right, Rimes skipped out on the shindig following last week's embarrassing tiff surrounding an e-mail from the editor-in-chief to readers upset about having a "husband-stealer" on the cover.

Her rep denies Rimes' absence had anything to do with the brouhaha, telling Page Six that the singer is under the weather. "Unfortunately [Rimes] caught the flu, and under doctor's orders was advised not to travel or go out."

Indeed, Rimes has canceled appearances for Friday as well, including a show at the Turning Stone Resort and Casino in central New York.

A week ago, it was reported that editor-in-chief Valerie Latona sent an e-mail to subscribers apologizing for featuring Rimes on the cover, writing, "You are all in good company ... as you all agree Shape has made a terrible mistake in putting LeAnn Rimes on the cover."