<P> Happy Feet received generally positive reviews from critics, and won the Academy Award for Best Animated Feature, a first for Warner Bros., as well as the BAFTA Award for Best Animated Film . It was nominated for the Annie Award for Best Animated Feature and the Saturn Award for Best Animated Film . </P> <P> A sequel, Happy Feet Two, was released into theaters November 18, 2011 to mixed reviews . </P> <P> Every emperor penguin sings a unique song called a "heartsong" to attract a mate . If the male penguin's heartsong matches the female's song, the two penguins mate . Norma Jean, a female penguin, falls for Memphis, a male penguin and they become mates . They lay an egg, which is left in Memphis' care, while Norma Jean leaves with the other females to fish . While the males struggle through the harsh winter, Memphis briefly drops the egg . As a result, their son, Mumble, is unable to sing, but he can tap dance instead . Nevertheless, he is enamored with Gloria, a female penguin who is regarded as the most talented of her age . One day, Mumble encounters a group of hostile skua, with a leader who is tagged with a yellow band, which he says is from an alien abduction . Mumble narrowly escapes the hungry birds by falling into a crevice . </P> <P> Now a young adult, Mumble is frequently ridiculed by the elders . After escaping from a leopard seal attack, Mumble befriends a group of Adelie penguins called "the Amigos", who embrace Mumble's dance moves and assimilate him into their group . After seeing a hidden human excavator in an avalanche, they opt to ask Lovelace, a rockhopper penguin, about its origin . Lovelace has the plastic rings of a six pack entangled around his neck, which he claims have been bestowed upon him by mystic beings . </P>

What is the name of happy feet's main character