Sharon Osbourne has predicted that Justin Bieber’s career won’t last.

The 60-year-old, who recently admitted she would love to return to The X-Factor, told the National Radio Conference in Sydney that the Canadian heart-throb’s audience may soon outgrow him:

"For me, Justin is... I've met him, I've worked with him, I did a TV commercial with him. He's a really great little guy. But that's his problem - he's a little guy.

"His fans are growing up, they're 18, 19-year-olds now. And that means the little girls of titties and lips (sic), you know they're young women. And he still looks like that little boy! He needs some hair, or something.”

Osbourne, whose son Jack recently rescued a drowning woman, went on to add:

"I just don't think, from my gut, maybe my gut's wrong 'cos it's not 100%, but I don't think he's going to stand the test of time.

"But you know what, I don't feel sorry for him, because he's made oodles and he's a fabulously nice person and he'll go on to do something else."

Watch the video for 'Beauty And A Beat' below: