Kelly Osbourne would never go back to an ex-boyfriend.

The 26-year-old star - who split from fiance Luke Worrall last year amid speculation he had cheated on her - believes it is pointless to revisit old romances as there is always a good reason why they came to an end.

She wrote in her column for Closer magazine: "I don't think I could get back together with any of my exes.

"I think there's always a reason why you broke up in the first place, so it's best to move on with your life."

While she is currently single, Kelly recently praised her parents, Ozzy and Sharon Osbourne, as the "definition of true love."

Writing on her twitter page, she said: "happy anniversary mum and dad! you are the definition of true love! @MrsSOsbourne @OfficialOzzy. 30 years of true love! (sic)"

However, Kelly didn't take too kindly to the comments of one fan, who suggested Sharon and Ozzy's relationship was "f****d up" referring to an incident in 1989 when the former Black Sabbath rocker reportedly attempted to strangle his wife.

He tweeted: "@MissKellyO Didn't your Dad strangle your Mum unconcious? f****d up love if you ask me. (sic)"

To which Kelly replied: "go and f**k yourself with a hedgehog! (sic)"