Paris Hilton has been spotted cosying up to Britney Spears' ex-husband Kevin Federline.
The hotel heiress, who has become good friends with Britney after partying with her several times this year, was seen laughing, joking and kissing with Kevin at Las Vegas' LAX nightclub on Saturday.
A source said: "Kevin and Paris were having fun. He kept shouting out her name and gave her a kiss on the cheek and then whispered something in her ear. It looked as though they were getting quite friendly."
Britney was reportedly furious after seeing photographs of Paris and Kevin together at the weekend.
This isn't the first time Britney has felt betrayed by one of her friends recently.
Lindsay Lohan is said to have upset the 'Toxic' singer by dating Britney's ex-lover music producer J.R. Rotem.
Although Kevin seemed to be enjoying himself with Paris, he was left red-faced after deciding to grab a microphone and rap to the crowd.
A source told gossip website TMZ.com: "Kevin tried his best, but all he did was spew a loud, heaping load of annoyance. Clubgoers were fleeing for the exit once he started."
Meanwhile, Kevin's lawyer Mark Vincent Kaplan has revealed he is determined to depose Britney in the New Year.
Kaplan said: "Britney Spears will have her deposition early this year. We've got a lot to talk about. Kevin isn't interested, nor am I, in punishing her.We just want to get information necessary to proceed further."
Britney missed a scheduled deposition in December over the custody of the couple's two children, Sean Preston and Jayden James, after claiming she was ill.
Kaplan also said Kevin had a "happy" Christmas with Sean Preston and Jayden James, his ex-lover Shar Jackson and their two children Kori and Kaleb.Kaplan added to People magazine: "It was a good Christmas for all. They were great. Kevin had all of his kids and it was a big, wonderful family setting.
He was really happy, and the kids were happy."