Kristen Bell Makes Surprise Appearance at D23 Expo to Sing 'Do You Want to Build a Snowman?' With 'Frozen' Cast (Video)

Kristen Bell takes the stage as she surprises the audience at the 2015 D23 EXPO held at Anaheim Convention Center on Sunday (August 16) in Anaheim, Calif.

The 35-year-old actress sang “Do You Want to Build a Snowman?” with her Frozen co-stars Katie Lopez and Agatha Lee Monn.

In case you didn’t know, all three played the character Anna at different ages during the movie. Watch their performance below!

Also in attendance that day was Josh Gad, who of course voices Olaf.

10+ pictures inside of Kristen Bell, Josh Gad, and more of the Frozen cast at the D23 Expo…