Madonna and Gwyneth Paltrow once enjoyed a Frence kiss at a showbiz party, the singing star’s younger brother Christopher Ciccone writes in his new unauthorized biography Life With My Sister Madonna. Chris claims the pals were dancing it on a table when Madge pulled Mrs. Chris Martin in for a bit of tongue action.

“Madonna grabbed Gwynnie, pulled her to her and kissed the stunned Hollywood star full on the mouth…”