Kelly Osbourne, daughter of rocker Ozzy, says she suffered more for being fat than for using drugs because the pressure to be thin in Hollywood is "a killer".

The 20-year-old "Life As We Know It" star admitted that she was taking drugs before the chat-show "The Osbournes" debuted on TV. But suddenly hearing she wasn't thin enough or pretty enough was very painful, reports Ireland Online.

According to Kelly, it's an awful existence being famous - because "you realise it's not about you. It's about what others want you to be."

Last year, Kelly was admitted to a drug rehabilitation clinic in California after admitting abusing painkillers. In 2003 she cancelled a European tour because of "health reasons".