Sources are saying that the Britster is planning to marry Sam Lufti in a Vegas ceremony. We all know how those turn out, right?

The troubled pop star wed childhood pal Jason Alexander Sin City-style in 2004 — a union that lasted all of 55 hours. But according to Star Magazine, this time she wants to hitch her wagon to professional hanger-on Sam Lutfi.

In fact, an insider told the publication Britney already announced her marital ambitions to her lawyers and ex-hubby, Kevin Federline. “[The lawyers] begged her to at least get a prenup, but she didn’t seem to be listening.”

K-Fed’s none too happy, either. “Kevin has seen Sam lose his temper,” said a family spy. “We hear he swears a lot and makes very derogatory statements when he’s alone with Brit. Kevin has forbidden Britney from having Sam around the boys. In fact, Kevin has threatened to get a restraining order. She’ll lose custody if she allows Sam around them, Kevin will make sure of it.”

I’ll have to see this to believe it.