Kelly Osbourne has revealed that she once passed out after a drugs binge and woke up in a urine-soaked bed with her mother Sharon punching her in the back.

Speaking on the show 20/20 about her past narcotic addictions, the reality TV star opened up about her feelings of self-pity and the incidents that came with it.

She said: "I remember one night being woken up by my mom punching me in the back so that I started breathing again in bed, and I had p****d myself in my sleep.

"I'm sorry, but at 20 years old, to wake up by your mother trying to resuscitate you in a bed of your own p**s, that is mortifying."

Kelly admitted that she used to take 100 pills a day in order to deal with accusations that she was only famous because of her parents Ozzy and Sharon.

She added: "All the voices in my head that were telling me that I was worthless, that I was fat, that I'll always just be someone's daughter and never make anything for myself...all these things in my head, as soon as I took this pill, just silenced.

"I didn't like the person I was, so I took drugs."