MADONNA stayed for just an hour at husband Guy's 40th birthday party and here's why - she needed all her energy for last night's incredible performance at Wembley Stadium. The 50-year-old queen of pop showed off her honed and muscular body as she cavorted around the stage in a white silk top hat, high cut leotard, fishnets and leather stiletto boots. Her energetic routine would have put to shame artists half her age, and proved those hours in her private gym have paid off. The mother-of-three is touring the world with her Sticky and Sweet tour which is flying to 37 venues for the roadshow in just under four months, transporting a team of 250. Amongst the thousands of fans last night were her A-list friends Gwyneth Paltrow and Kate Hudson, whose mouths dropped open in amazement at Madonna's athletic exploits. The audience also included Norway's Crown Princess Mette-Marit and Fergie from the Black Eyed peas. The decadent two-hour show, which involved 1million of jewellery, saw Madonna perform many of her greatest hits, as well as indulging in eight costume changes. The pop superstar arrived onstage dressed in a Givenchy outfit in a vintage white American car for the first section of the four-part show.  Labelled Pimp, the opening sequence was recently described by the Material Girl's publicist as a homage to '1920s deco and modern day gangsta pimp'. Madonna followed up that segment of the concert with Old School, a tribute to the her roots in the urban dance music of early 1980s New York. The remaining two sections, Gypsy and Rave, continued the high-energy performance.                            - Daily Mail