I Would Normally Say This Is Immature, But In K-Fed's Case, It's Perfect

Britney Spears called the Fed-Ex to ask him if he'd seen pictures of her kissing music producer "J.R." Rotem and then bragged about a sexual escapade she'd just had.

What's more, Britney has been taunting Federline about his newly-reduced financial status. "It was really bad," says an eyewitness. "[Brit] just started pushing his buttons ... he started screaming at her."

Not only do I love this shit, I just wish I could cut off a muthatrucka's cash flow like Brit can. K-Fed is such a loser. I love Britney for this. Work it out, ho. Work it out.

Updates on her new bf, J.R.:

The pair caught a screening of the movie The Holiday on December 10 followed by drinks at The 3rd Stop, a wine bar in Los Angeles. Frank Alix, owner of The 3rd Stop, tells In Touch that they stayed at the bar for a couple of hours drinking champagne.

JR, who has worked with Britney as well as with her ex-husband, Kevin Federline, and Destiny's Child, has said previously. "She's arguably the biggest pop star in the world, so you would assume she could have an ego. But when I got into the studio with her, she was just a real person."

in touch and tmz