Talking to Idina Menzel about her concerts, her sister and, of course, 'Let It Go'

Idina Menzel mooed as the performance artist Maureen in the original production of "Rent" in 1996 and, ever since, Broadway audiences have mooed back.

Over the past decades, Menzel has won over everyone from musical theater nerds to Tony voters to princess wannabes, as Maureen with her audience-participation bit about cows, defying gravity as the green-girl Elphaba in the Broadway musical "Wicked" and solidifying the empowerment anthem "Let It Go" as a smash hit as the voice of snow queen Elsa in Disney's 2013 movie "Frozen." She has appeared on Fox's "Glee" and went back to Broadway in the Tom Kitt and Brian Yorkey