It appears Britney Spears will celebrate her 24th birthday without a buzz and without her hubby Kevin Federline. The couple has separated, at least temporarily, and K-Fedhas moved into the Beverly Hills Hotel, according to several published reports.

A friend with weed...

The pop tart reportedly went off once Kevin allowed marijuana in the house with baby Sean Preston.

NY Daily News gives the dish:

Word is Brit lost it when a pot-packing pal of Federline's showed up at their house.

"Britney turned around and fired two of her longtime security guards for letting what she called 'the weedman' into the house," a source tells Star magazine. "She just seemed crazy with anger."

Spears is said to have become exasperated with her hubby's well-documented partying since the birth of their son, Sean Preston, 11 weeks ago. Federline, whose hobbies Spears finances, has brushed off her pleas that he see a therapist, according to insiders.

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How 'Entourage' is that?

A friend with weed - is a friend that can get you booted out of your house. No word if 'the weedman' is over at the Beverly Hills hotel with Kevin.

Perez Hilton seems to have nabbed the first hint of the blow up:

"…Once the two went home, the party went sour quickly, and a very well-placed source tells PerezHilton.com exclusively that Spears and the Federjerk got into a heated exchange in their Malibu mansion and Brit kicked the stoner to the curb. (Kevin was witnessed leaving the house in the early A.M. hours by himself)…"

This could get interesting.

--Jill Atkins writes from Hollywood