Aguilera's new boyfriend 'a ladies' man'

Christina Aguilera's alleged new boyfriend Matthew Ruther has been criticised for his 'wild behaviour' and for a reputation as a 'ladies' man'.

A source close to the Burlesque star told Star Magazine that Ruther is taking advantage of having a famous girlfriend.

The insider said: "Christina is completely taken with Matthew. But he's a wild rocker type with a reputation as a ladies' man."

The source continued: "He networks like crazy with all the big names she introduces him to. He's a major operator. And everything is on her dime, because he's broke."

It's also alleged that the rocker spends his nights at Aguilera's Beverly Hills mansion instead of his 'crummy apartment'.

The insider added that friends of Aguilera are concerned that it's "too much, too soon" after the popstar's recent split with ex-husband Jordan Bratman.