LONDON, ENGLAND - JULY 04: Singer Madonna performs onstage during the opening night of her "Sticky and Sweet" tour at the O2 Arena on July 4, 2009 in London, England. (Photo by Kevin Mazur/WireImage)
LONDON, ENGLAND - JULY 04: Singer Madonna performs onstage during the opening night of her "Sticky and Sweet" tour at the O2 Arena on July 4, 2009 in London, England. (Photo by Kevin Mazur/WireImage)