Former Britney Spears assistant Shannon Funk has denied claims that she will tell-all, but Star Magazine claims the blonde has incriminating cell phone pics featuring the barely clothed pop star. Shannon is also willing to back Kevin Federline in his upcoming custody hearing.

“Shannon contacted Kevin’s friends at one point – and that gave him the idea that she might rat Brit out. Then Kevin contacted Shannon. She told him she had cell phone pictures of Britney and herself partying – including pictures of Britney acting silly while intoxicated and running around the house barely clothed!”

“He thinks it’s better to have Shannon tell the court about Britney than just say it himself,” the insider adds. “Kevin wants sole custody of the kids and he’s determined to get it,” says his friend. “To see his kids’ safety being constantly jeopardized by an out-of-control Britney is tearing him apart!”