On Sunday, Kristen Bell, the actress who plays Princess Anna in the Disney hit Frozen, made a surprise appearance at the Disney D23 Expo in Anaheim, Calif., and sang an unreleased demo recorded for Frozen called “The Spare.”


Bell and Josh Gad, who plays Olaf the snowman, both showed up to the ‘Frozen Fandemonium’ finale for interviews and to perform their biggest hits from the beloved 2013 animated film.

Bell also joined Agatha Lee Monn and Katie Lopez, who play the younger versions of Princess Anna, in performing the song “Do You Want To Build A Snowman,” making it the first live performance of that track.

Finally, the entire group present at the Expo took to the stage to sing “Let It Go.” Unfortunately, Idina Menzel did not make an appearance.

Frozen is set to be adapted into a Broadway musical, and the Frozen sequel is in development. No release date has been set for the sequel yet.

The film has become one of the most popular Disney films in history, grossing over $1.2 billion worldwide, which also makes it the highest grossing animated film in history. It is no surprise that the film won two Academy awards in 2014 for Best Animated Film and Best Original Song.