The 31-year-old beauty was reportedly inseparable from the I LIKE THE WAY hitmaker at Jade Jagger's villa party in Ibiza last night (27AUG05), after the pair shared a passionate kiss early in the evening.
An onlooker says, "It was a great party. Everyone was well oiled and I saw Kate snog Kaz.
"They were all over each other. I was shocked to see Kate so open with Kaz, even if it was a private do."