Being a former dancer and choreographer, Nigel Lythgoe - executive producer and judge on US So You Think You Can Dance - has high expectations of this year's contestants. As the final six get ready to carve up the dance floor, WHO spoke to the mastermind behind American Idol from his New York home to find out what he really thinks of their moves. What's he looking for in a winner, four seasons in?

"Someone who can make the American public stop eating their chips, get up off the sofa and vote for them!" quips Lythgoe, 59. As for being labelled Mr Nasty? "It's only the Brits who call me nasty Nigel," he says. "Everyone else says I'm a really nice guy!"

See what Nigel thinks of the final six