Elsa (Frozen) of the song "Let It Go", with critics frequently calling her a "powerhouse". Attempts were made as early as 1937 by Walt Disney to adapt Hans Christian Andersen's fairy tale, "The Snow Queen", into a film. The tale focuses on two children, one named Gerda, who served as the basis for Princess Anna, and the other named Kai, who is "cursed with negativity" after his heart is pierced with a shard of glass from an enchanted mirror and is later kidnapped by the Snow Queen. However, Disney struggled with creating a believable, multi-dimensional adaption of the fairy tale's title character,
Frozen (2013 film) cinematic history, the seventh Disney-distributed film, the fifth non-sequel film, the second Disney-distributed film in 2013 (after "Iron Man 3"), and the first animated film since "Toy Story 3" to do so. "Bloomberg Business" reported in March 2014 that outside analysts had projected the film's total cost at somewhere around $323 million to $350 million for production, marketing, and distribution, and had also projected that the film would generate $1.3 billion in revenue from box office ticket sales, digital downloads, discs, and television rights. "Frozen" became Fandango's top advance ticket seller among original animated films, ahead of previous record-holder "Brave",