Sharon Osbourne has claimed that Jonathan Ross was the final straw for daughter Kelly, provoking her to undergo rehabilitation.

The Osbourne matriarch told Reveal magazine how Ross made comments when Kelly appeared on his show concerning the cover of her new single, saying that the picture looked heavily airbrushed and little like the real Kelly.

She explained that Ross' criticism was "the straw that broke the camel's back. Kelly became hysterical. We didn't know what she might do, so we decided she needed treatment."