"Frozen" was a sizzling attraction Sunday at the Westport Library as several hundred fans turned out for a chance to see -- and join voices with -- the princesses Elsa and Anna who now rule the global box office.

There was a full house on hand for the library's free screening of a sing-a-long version of the wildly popular Disney movie, which has become the highest-grossing animated movie of all time since its release in 2013.

Several of the young fans -- as well as Teen Librarian Jaina Lewis -- even attended the show dressed as the film's lead character, Elsa.

Chronicling the adventures of sisters Elsa and Anna, the movie is perhaps best known for the hit song, "Let It Go," which won an Academy Award for Best Original Song -- a theme that just about every girl in the audience Sunday sang loudly and enthusiastically.

Adding a little icing -- in this case, special custard -- to the event was Dave Yearwood, the general manager of Shake Shack in Westport, who offered free helpings of "Elsa Ice," along with peppermint sprinkles, for the fans.