Madonna and Rihanna reportedly fought over the Louis Vuitton boots the Material Girl wore to the Costume Institute Gala on Sunday.

According to insiders, the Umbrella singer had planned to wear the thigh-high, PVC-look footwear but "but Madonna wanted to wear them, and insisted that nobody else could be seen or photographed in them."

The New York Post's source adds: "Madonna was being so pushy, but Rihanna was fine with it."

In the event, Madge's outfit - she teamed the boots with a mini ruffle dress and two blue satin prongs sticking out from either side of her head – was generally considered the most ill-advised of the night.

So we think Rihanna had the last laugh...