Lance Bass could be singing "Bye Bye Bye" to hundreds of lovelorn female fans if his plans to marry 7th Heaven stunner Beverly Mitchell work out.

The couple are madly in love and want to get hitched as soon as possible, say pals. They've even started planning a secret wedding!

"Beverly was afraid what her boss, Aaron Spelling, would say about her and Lance," says a source. "Mr. Spelling's very protective of his young cast members and doesn't want them to be distracted from their careers. But it's gotten to the point where Beverly and Lance are tired of keeping their romance under wraps."

The couple met just over a year ago when the actress convinced producers to have the 'N Sync heartthrob guest star on 7th Heaven. They hit it off right away, and sources say by the second day of shooting, Mitchell invited Bass home for dinner and to meet her family.

"It was one of those big gatherings where the whole family gets together to have dinner and watch a movie," says a source. Bass then took her home, so she could meet his family -- dad Jim, a laboratory manager, and mom Diane, a teacher -- who wholeheartedly approved of the religious California gal. Pals knew something was up when the singer kept sneaking away for long, intimate talks on his cell phone.