Confused about the identity of the singer who just performed Frozen's "Let It Go" at the Oscars? You're not the only one. Presenter John Travolta managed to make a pun out of singer Idina Menzel's previous starring role as Elphaba in Wicked on Broadway — but it's clear he has no idea who she actually is. "The Wicked-ly talented, one and only Adele Nazeem," said Travolta: