Top Beverly Hills plastic surgeon Robert Rey has urged Britney Spears to take better care of herself after claiming shocking new pictures of the pop star suggest she's aged 15 years in just two.

The surgeon, who fronts US reality TV show Dr 90210, was stunned by new photos of Spears, which prompted America's top daily newspapers to ask, 'Is this really Britney?" on Friday.

And he appeared on news show The Insider on Friday to slam party-loving single mum Britney's pale and aged 'new look.'

Comparing the new late-night photo to one taken of the pop princess two years ago, Rey said, "There's puffiness under her eyes, the quality of the hair has changed. You can see even some wrinkles.

"One can see that she may have aged 10 to 15 years more."