"I've been to rehab seven times and to two mental institutions," Kelly Osbourne, discussing how mother Sharon supported her throughout her numerous stints in rehab, tells September's Cosmopolitan U.K., out Aug. 7.
"My mum even had me put in a padded cell once to scare me," says Kelly, 28, "but like a brat I just sat it out until she said, 'Well, that's not going to work.' "
And – like mother, like daughter – Kelly, in turn, also diligently took care of Sharon 10 years ago when the matriarch was battling cancer.
"When I was 18, I was set to play Lindsay Lohan's best friend in Freaky Friday. Then my mum got diagnosed with cancer," says Kelly. "I was faced with the choice of a career or spending what could have been the last days of my mother's life with her."
The choice was apparently clear. " 'I said, 'F--- you, career, hello, Mother.' I became my mum's nurse 24/7," she says. "I gave her injections and medicines when she had seizures. I even had a parking space at the hospital with my name on it. I thought I was going to lose her – it was awful."
When father Ozzy Osbourne had a near-fatal quad crash in 2003, Kelly stepped up once again.
"He couldn't move from the neck down and was basically a paraplegic, so I slept on the floor by the side of his bed for four months. I brushed his teeth and washed his clothes, and every day we'd put on our swimsuits and I'd shower him," she says.
Up Close and Personal"Not many people can say they've wiped their mother and father's arses more than they've wiped their own," she adds.
The Osbournes' struggles with addiction have never been a secret. Ozzy, 64, abused drugs and alcohol for 20 years before he checked into the Betty Ford Center the day after Kelly was born. Jack Osbourne, 27, was treated for drug and alcohol addiction at 17, and Kelly's first stint in rehab was at age 19, followed by another visit the following year.
Kelly even admits that she used to hide her drugs so that she wouldn't have to share them. "I wanted them all to myself," she says. "I was quite selfish."
On the plus side, Kelly says that the recognition that she was pushing away those around her helped her to get clean.
"What changed for me was looking around and seeing that nobody liked me or wanted to work with me."
September's Cosmopolitan U.K. digital edition will be available on the Apple Newsstand.