Kelly Osbourne: I Was Never as Fat as Christina Aguilera

Ouch! Osbourne calls out the singer for her curvy frame on an episode of Fashion Police

There's no love lost between Kelly Osbourne and Christina Aguilera. The television personality has bluntly criticized the singer's weight -- again.

"She called me fat for years. I was never that fat," Osbourne commented on Friday's episode of E! Fashion Police during a conversation about Aguilera's curvier-than-usual appearance at the Michael Jackson tribute concert.

Aguilera's skimpy ensemble for the concert in Cardiff, Wales, was shockingly tight and a bit unflattering, but Osbourne's dig is more than a casual observation about the Grammy-winning singer. This is not the first time Osbourne, 26, has slammed Xtina, 30, for tipping the scales.

"She called me fat for so many f***ing years," Osbourne said on the show in August. "So you know what? F**k you! You're fat, too." 

Osbourne -- who also called Aguilera a "fat b-tch" in the August episode of Fashion Police -- lost nearly 50 lbs. while competing on season nine of Dancing with the Stars in 2009. (She impressively came in third place.) She's kept off the weight for two years and apparently feels she's entitled to even the score.

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