Paris Hilton has been spotted getting friendly 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 and joking with Kevin at Las Vegas’ LAX nightclub on Saturday (29.12.07).

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.