Nearly three months after separating from her husband, Christina Aguilera has gone public with her new man — holding hands with him in L.A. over the weekend — but an insider tells Star she could be courting more heartache!

In the Dec. 6 issue of Star, on sale now, we report that the Burlesque star is jumping from a bad marriage to a risky romance with production assistant Matthew Rutler, who’s also a guitarist in the Nate Mott Band. Christina met the New Jersey native last February on the set of Burlesque when she was still married to Jordan Bratman and they developed a secret friendship. Now, with her divorce in the works, she’s moving on — quickly! — and has officially been dating Matthew since September.

“Christina is completely taken with Matthew,” an insider tells Star. “But he’s a wild rocker type with a reputation as a ladies’ man.”

And Matthew has been soaking up the benefits of having a famous girlfriend! “He networks like crazy with all the big names she introduces him to. He’s a major operator,” adds the insider. “And everything is on her dime, because he’s broke. Matt used to live in a crummy apartment with roommates; now he’s at her Beverly Hills mansion every night. He’s in heaven!”

He may be on cloud 9, but Christina’s friends are worried about the smitten star.

“She’s so fragile and isn’t seeing clearly,” says the source. “Everyone is concerned that it’s too much, too soon.”

Source: Star Magazine