Kelly Osbourne dated the pizza delivery boy while on drugs

Kelly Osbourne used to hurl herself down the stairs and even stooped to pulling the pizza delivery boy during the darkest depths of her drug addiction.

Osbourne made her confession as she detailed some of her lowest moments by expanding on her recent admission that she could have died without going to rehab in January.

The part-time pop star, battling a painkiller addiction, revealed: 'It's so embarrassing the number of times I've thrown myself down the stairs to try to hurt myself to get pills.'