Kevin Federline stretches out his arms and puffs away at his cigarette on Friday outside his trailer on the Wilmington, N.C. set of One Tree Hill.

The aspiring actor/rapper will guest star in a multi-episode arc playing would-be rapper Jason, “a cocky, enigmatic frontman” for No Means Yes, a legendary rock band in the show’s fictional setting of Tree Hill, North Carolina.

Last year, Federline did a guest spot on CSI: Crime Scene Investigation as a young thug named Cole Tritt.

K-Fed was later seen touching down at LAX airport on Saturday.

Bigger K-Fed picture inside… More Here! »

Add another tabloid to the mix! Star Magazine, too, is throwing Britney Spears under the bus this week, claiming that Britney’s kids were both mistakes.

Claims Star, “She makes out with men in front of the boys, refuses to change their diapers, puts whitening strips on their teeth.”

Poor Britney. She’s never going to catch a break with the tabs!

People magazine won’t feature Britney on their cover, right? RIGHT?

Britney Spears continues to make waves, taking the cover of Us Weekly yet again this week.

This issue highlights ex-staffers turning on Spears, spilling her darkest secrets to an enraged Kevin. Here is the list of Britney’s recent bizarre behavior:

– DRUNK WITH BABIES
– BIZARRE NUDITY
– DEMANDS THEY SHARE HER BED

Says one nanny: “At first, the drinks would help her loosen up and not be so angry. But she’d inevitably drink too much and be out of it, at which point the nannies would take care of the kids.”

Confirms multiple sources, “She’ll strip down in front of staff, nannies, whomever. She’ll ask, ‘Do I look sexy? Do I look pretty?’ She’s extremely insecure.”

Didn’t Brit make her nannies sign contracts??? Non-disclosure agreements??? Who can Britney trust these days??? Anybody???

Chronic panties flasher Britney Spears flashes her purple polka dot panties on Monday night while out to dinner with 10-month-old son Jayden James (clothing tags still in tact!) at Cravings in Beverly Hills, Calif.

Recently, Britney and ex-hubby Kevin Federline have been in a sordid mess, fighting for custody of Jayden and older son Sean Preston, 23 months.

Last Wednesday, K-Fed filed documents requesting “primary physical custody of his two children” in Los Angeles Superior Court. The next hearing is scheduled for Tuesday.

Life & Style Weekly and Us Weekly have nearly identical covers this week, calling Britney Spears out on being a bad mother.

L&S claims Sean P., 22 months, fetches Britney’s cigarettes for her!!!!!

“When Britney and Kevin were first married, she objected to his smoking around the kids, the insider notes, but now ’she smokes like a chimney in front of them.’ Even worse, when Brit misplaces her pack of cigarettes, she’ll actually turn to Sean and say, ‘Baby, where are Mama’s lollipops?’ Sean runs, gets her cigarettes and brings them back to her.”

Here’s the rest of the “inside look” at the worst mother of the year:

K-fed to one partygoer: “People are telling me I should take the kids away from her. I’m glad the world is finally giving me the benefit of the doubt that I’m actually a good father.”

Britney’s sons don’t have stability: “It’s tragic what these boys are exposed to on a daily basis. Kids thrive on routine and the feeling of safety, and Sean and Jayden have neither. Their lives are subject to Brit’s whims.”

Britney constantly hands kids when she’s tired: “She has a short attention span, and that applies to caring for her kids. Jayden is at a fussy stage, and when he starts crying, Brit hands the baby to a bodyguard to calm him down. When she needs a break, she gives her boys to the nearest person — even shopgirls at clothing stores!”

When Sean asks for Grandma, Britney: “tells the boys, ‘she’s a bad lady.’”

Bigger Britney cover inside… More Here! »

BRITNEY’S BOYS CRY FOR HELP!

Us Weekly is throwing Britney Spears under the bus in this week’s issue.

The harsh cover blurb reads: “Soda in baby bottles, mommy’s many men, nighttime cries for Daddy’s love. Kevin battles for Sean & Jayden as Britney grows more dangerous.”

The inset has the lovely picture of Britney dancing on a stripper pole from her latest music video shoot, which is still incomplete.

Life and Style is also reporting that Britney just sold her Malibu mansion for just under $12 million. The seven-bedroom mansion, purchased by an anonymous buyer, sits on a 1.53-acre hilltop site in the gated Serra Retreat section of Malibu.

Britney, meanwhile, is living full time in the Four Seasons Hotel in Beverly Hills.

Britney Spears shows off glimpses of her panties and bra in a skin tight pair of denim jeans while out house-hunting in Los Angeles on Sunday.

The pop princess checked out a posh $6.5 million mansion in Pacific Palisades, California while carrying her 10-month-old son Jayden James.

Britney’s new bodyguard/manny (not Daimon) carried 22-month-old son Sean Preston during the tour of the five-bedroom, eight-bathroom mansion (designed and built by actor Ray Liotta in 1992).

Following the tour, the real estate agent was seen taking down the ‘For Sale’ sign outside the home and putting - sparking speculation Brit has already made a decision to rent or buy the house.

An exclusive interview with Britney is supposed be featured in this week’s OK! magazine, which was done on the set of her new music video. Check it out on newsstands later this week!

P.S. Be sure to check out the reflection in the car door window!

Britney Spears carries son Jayden James, 10 months, aboard a boat in Marina Del Rey, Calif. on Friday while a female friend carries Sean Preston, 22 months.

Scope out this NSFW video of a pissy Britney cursing out one overweight paparazzo:

“Hey, baby! When you gonna get on a diet? Have you ever tried weight watchers you fat f*k? Why don’t you run you need a f*ing job you p*y. Yeah run. Run b*h.”

Earlier in the video, Britney also gets fed up photographers, saying:

“Ma’am, it is illegal to do this. You have got to stop using the cameras and following people. It is illegal you have got to stop doing that.”

25+ pictures inside of Britney and her sons on the high seas… More Here! »