Amy Winehouse has been crowned the U.K.'s most downloaded act of 2007. The singer - who has been nominated in six categories at the forthcoming 50th Grammy Awards (Feb08) - topped iTunes' album download chart with her LP Back To Black, beating Mika's Life In Cartoon Motion and Arctic Monkeys' Favourite Worst Nightmare, which took second and third positions respectively. The top-selling individual track of the year was Mika's song Grace Kelly.