Kelly Osbourne tested four times a year for STDs

KELLY Osbourne has disclosed that she is tested four times a year for sexually transmitted diseases.

The daughter of rocker Ozzy Osbourne, Kelly, 23, admitted having unprotected sex in the past but said she had the tests for her own peace of mind.

Recently-married Scarlett Johansson has previously said that she has two HIV tests a year, and said that anyone who did not was "disgusting".

Osbourne told New! magazine that she saw her first condom when she was around seven, on her Black Sabbath star father's tour.

She said: "I was on tour with my dad and at every single one of his shows, they hand out free condoms.

"I was about seven or eight and I picked up a packet and was like, 'Mum, what's this?'

"She had to explain to me what they were. It was something my parents had never been shy about. They always told us what they think and that we should protect ourselves."

CLICK HERE FOR OUR GALLERY OF THE CHANGING FACE OF KELLY OSBOURNE

Osbourne said her mother, former X Factor judge Sharon, did not like her daughter being on the Pill because she feared it increased the risk of cancer - and she also believes microwaves are dangerous.

She added: "Mum did have a problem with me going on the Pill. She doesn't like that I'm on it.

"Because of her history (of bowel cancer) she's absolutely convinced it causes cancer. I don't have a microwave in my house for the same reason."

Osbourne, who is dating model Luke Worrall and is an ambassador for World Contraception Day, added: "Alcohol and drugs impair your judgment. I know it's because I was drunk that I had unprotected sex."

She said: "I go three, maybe four times a year to get tested (for sexually transmitted infections) and most of the time I don't even need to. I just go for peace of mind."

CLICK HERE FOR OUR GALLERY OF THE CHANGING FACE OF KELLY OSBOURNE