Kelly Osbourne's bullies used to taunt her for her ''big belly''.

The 27-year-old British-born presenter - who has remained slim since shedding 50lbs during a 2009 stint on 'Dancing With The Stars' - admits she was tormented as a child because of her fuller figure.

She said: ''I call myself an FFP: former fat person. And when you're an FFP, you will always see in yourself what people used to bully you for.

''I grew up on the road with my father, Ozzy Osbourne, but I came from a very, very small village, where everyone called me 'Kelly Smelly With the Big Belly Whose Dad's on the Telly'.

''It hurt so badly to be judged like that. Even now I don't consider myself skinny. But I have put a lot of hard work into my body over the years, and in the process, I've really learned to love myself.''

Kelly famously dubbed Christina Aguilera a ''fat bitch'' whilst co-hosting 'Fashion Police' on E!, but insists her comments were pay-back.

She told Glamour magazine: ''Sometimes it's other people's voices you have to shut out. That's what happened with me and Christina Aguilera, which people don't understand.

''She called me fat for years. One night on 'Fashion Police' I said, 'F**k you. Now you're fat too'. I didn't say I wasn't fat. I said, 'Now you know how it feels'.

''And I'm sorry, but I stand by that. I make a point on the show never to say anything about anybody that I wouldn't say directly to their face.

''I'm famous, and she's famous; it doesn't mean I can't stand up for myself. I took it for 10 years and finally decided to be like, 'You know what? I'm done'. And that's the last thing I will ever say about it.''