Yes, everyone is obsessed with Idina Menzel's "Let It Go" from Frozen, but we can't forget Kristen Bell's amazing song, "Do You Want to Build a Snowman." Now Kristen's live renditions of the song — using all of Anna's voices — is going viral, nearly two months after she joined her castmates for a live performance of Frozen's hit songs at LA's Vibrato Grill Jazz Club. Watch Kristen belt it out above, and try not to get the song stuck in your head for the rest of the day! Can't get enough? You'll want to watch her duet, "Love Is an Open Door," too!