Kelly Osbourne, 27, didn’t exactly demure this summer on E!’s Fashion Police when photos emerged of Christina Aguilera, 31, looking less than svelte. "Maybe she is just becoming the fat bitch she was born to be," she said on the show. Ouch. The comments seemed particularly perplexing since Osbourne has had her own very public struggle to stay thin, but it turns out that she was just tyrying to get the last laugh. "She called me fat for so many f***ing years," ranted Kelly. "So you know what? F**ck you! You're fat too."