Christina AguileraChristina AguileraEver wondered why one day a celeb can look rough round the edges...

And the next they're sleek, hot and ready to roll?

Yup, it's a fickle ol' place, Celebville, and not least when you're talking fashion.

Take Xtina here.

On the one hand, she's a fan of skin tight tank tops that border on trashy and have frankly seen better days.

But there again, she's often Ms Glamour Puss, with designer togs and a sheeny hairdo to boot.

And it seems all Celebs follow in a similar vein.

Sometimes they're all-out there with their posh frocks and matching accessories that near-on scream a high-fashion style assault.

But seen another day, and they're more at home in a scruffy pair of trakkie bums, or sporting an outfit so garish it would make Kat Slater look coy.

Go see the jaw-dropping celeb style transformation with your very own eyes on our Chav to Chic star gallery.