Before the mezzo-soprano voiced the Disney queen in Frozen and became a legend among children (and snowmen), Idina Menzel spent two decades building an unforgettable musical theatre career. Menzel's most beloved Broadway roles—as Elphaba, the misunderstood witch from Wicked; and Maureen, Rent's East Village bohemian—were the platforms for many of the native New Yorker's signature numbers. But she's also a remarkable solo artist with a delightfully original catalogue of power ballads, adult contemporary boogies and Christmas carols.