Kelly Osbourne has attacked Paris Hilton's spoilt boyfriend for causing chaos at her birthday party.

Shipping heir Stavros Niarchos started a play fight at the party, resulting in £60,000 worth of damage and the hotel being evacuated.

The singer said: "Paris's stupid boyfriend ruined my 21st birthday."

"The manager tried to make me pay for it, but I was having none of it," she added. "I said no bloody way because I didn't do it. Stavros caused the damage, so he can pay."

Osbourne puts Niarchos' behaviour down to his indulgent upbringing. "He's a rich kid and they don't appreciate anything," she explained. "They grow up with it all. I find it really annoying."