Kate, 28, was spotted in Paris in the company of 60-year-old Ronald W. Burkle. Described by insiders as a "dear friend", the US supermarket mogul — who's worth an estimated $2billion — treated Kate to an all-expenses-paid,spree across Europe.

"Greece, Italy, France and more are on their itinerary," the insider says. "It's easy since Ron has a private jet."

Gossips report the pair went shopping with friends in Paris, and Kate seemed to be glowing in Ron's company. They stayed in the Plaza Athénée hotel and spent ages trying on clothes at the Balenciaga couture house.

"They are dear friends, and friends make the best lovers," the insider observes. "They both really enjoy spending time with one another."