Kelly Osbourne fought back tears during a benefit concert after she revealed that a member of her family was HIV positive.

The TV personality was speaking at a gig for HIV support charity Body & Soul at Koko in Camden, north London.

Introducing a performance by the Scissor Sisters, she said the cause was special to her because a member of her family had been diagnosed with HIV.

Photographers present at last night's concert reported that Osbourne sobbed before leaving the stage.

She shot to fame on the reality TV show The Osbournes, which followed the antics of her father, rock star Ozzy Osbourne, and his dysfunctional family.

Osbourne's representatives could not be contacted for comment.