Can you ever let go of "Let It Go"? "Let It Go" — as much as it might be annoying to a lot of moms out there, and dads — it’s one of the great gifts of my career. It’s given me a way of communicating and connecting with young people that brings me so much joy. And also, it's a reminder to a woman in her forties who has to be a role model to young people to practice what you preach. You’ll be singing in the sequel, Frozen 2, when you return as Elsa. Is "Into the Unknown" the next "Let It Go"? "Into the Unknown," and then there’s another song called "Show Yourself," which is pretty spectacular as well. Everyone always asks is it the next "Let it Go"? That's lightning in a bottle. All I know is this music really moved me when I heard it, and it moved me more when I was interpreting it. Do the film's sisters go on a quest to find their origins? Elsa has a calling. She's hearing this voice that’s sort of calling her into the unknown. And it's kind of a quest to unveil some secrets of their past, but even more so to understand who she is and why she has the power she does, and what her purpose is in the world.