The grudge: Kelly Osbourne won't let sleeping dogs lie and criticises Christina Aguilera's weight for the umpteenth time
Kelly Osbourne can't forget the past, which is why she continues to slam arch-nemesis Christina Aguilera's recent weight gain.
Although she called the 30-year-old singer a 'fat b***h' just over two months ago, she's done it again.
On E!'s Fashion Police Friday, co-host George Kotsiopoulous defended Christina's unflattering get-up at last weekend's Michael Jackson tribute concert.
He pointed out that she was 'still probably a size 2/4' despite her poor outfit choice.
'Trust me,' Kelly, 26, sniped. 'I'm a 2/4. That is not a 2/4.'
She continued: 'She called me fat for years. I was never that fat.'
The Voice judge has been the source of criticism for pairing a tight-fitting black bodysuit with fishnets, heavy-handed makeup and massive hair.
On a previous episode of the E! commentary show, Ozzy Osbourne's daughter had also attacked the Burlesque star's size.
'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', she said.
'She called me fat for so many f***ing years," Osbourne vented, 'so you know what? F**k you! You're fat too.'
Fashion police co-host Joan Rivers agrees with Kelly's analysis. 'Lady Marmalade got into the peanut butter again,' she said.
Kelly has battled her own weight issues in the past, but after appearing on Dancing with the Stars in 2009, managed to lose and keep off 48 pounds.
