London, August 04: Singer Kelly Osbourne has re-ignited the long running feud with her nemesis Christina Aguilera by calling her a "fat b****."

While shooting a segment for E!''s Fashion Police segment, the reality star criticised Aguilera for her fuller figure that has yo-yoed since the birth of her son Max in 2008, reports the Daily Mail.

Commenting on a photo of the singer wearing a tight black dress, the 26-year-old sniped; "Maybe she''s just becoming the fat b***h she was always born to be. I don''t know. She was a c*** to me."

Even after saying all this, the cattiness didn''t stop here, she added, "She called me fat for so many f**king years, so you know what? F**k you, you''re fat too!" she added. (ANI)