Britney Spears kicked off the MTV Video Music Awards in Las Vegas on Sunday (09Sep07) wearing just her underwear. The singer wore a silver and black sparkly underwear set and knee-high black boots to debut her upcoming single Gimme More. The performance is the star's first major public appearance in four years. Earlier, Kanye West criticised Spears for opening the ceremony, insisting her new track couldn't match the success of his single Stronger