Kelly Osbourne is back doing what she does best – shooting down fellow celebs like a sport.

Following in the footsteps of feisty mother Sharon Osbourne, Kelly voices her opinion on two top celebrities, our Queen-to-be Kate Middleton and Christina Aguilera.

Kelly started off the week by reigniting a long lasting feud with singer turn actress Christina Aguilera by mocking the her weight on US chat show.

The infamous pair have never got along and earlier this week on Channel E!’s Fashion Police Kelly took her opportunity to get her rival back for past derogatory comments and gave her a tongue lashing over her fuller figure.

When asked by E!’s Fashion Police to pass judgment on Christina’s Givenchy dress Kelly ceased the opportunity to publicly blast: “Maybe she is just becoming the fat bitch she was born to be. I don’t know. She was a c**t to me. And she bought my house!”

She continued: “She called me fat for so many f***ing years,” adding, “So you know what? F**k you! You’re fat too.”

After struggling with her weight and appearance all her life, Kelly amazingly shed a whopping three stones whilst competing on US show Dancing With The Stars in 2009.

However, Christina Aguilera is not the only celeb to get in the way of Kelly witty remarks. Kate Middleton’s dresses have aloso come in the line of fire.

Kelly believed that stingy Prince William should give his new wife a bigger wardrobe budget as compensation for being in the royal family.

Mimicking the fifties icon Marilyn Monroe with her platinum blonde curls and flowing ivory dress, budding fashion icon Kelly voiced her opinion on Kate’s recycled wardrobe loud and clear on the Jay Leno show.

Despite the glamorous Duchess of Cambridge being commended by Vanity Fair as being the Best dressed Women for wearing high street, Kelly was sure that the US fans would not approve.

“In England they are like, look how thrifty she’s being, showing the British public that the Royals are in a recession as well.”

Us Brits may consider Kate, 29, reused wardrobe as a mark of respect for the hard times the world is experiencing, but the 26-year-old is adamant that Kate’s royal duties should giver her the right to chuck out her outfits at the end of each day.

‘If I am going to be the future bloody Queen of England I’m going to wear that dress once,’ she told Jay Leno on The Tonight Show.

‘I’m giving up the rest of my life, all of my privacy. So at least I can get a new dress every day.’
Leno retaliated: “How about underpants? Would you throw them away?”
Kelly then comically replied: “Well, if I could I would”.