When this collection's predecessor (NOW 30) was released, Lady Gaga was still a bit of an unknown. NOW 31 captures her as her star rises with the catchy hit "Poker Face." Such is the magic of the NOW series, which strives for a balance of tried and true artists (Britney Spears, Black Eyed Peas, Beyonce) and bankable up-and-comers like the Ting Tings.