Happy Feet Two -

While Mumble's struggle was about dancing, Erik discovers his unique strength lies in opera singing .

It subtly highlights the impact of global warming and melting glaciers on Antarctic wildlife. Happy Feet Two

Watch the voice cast in action during their recording sessions: Happy Feet Two - Voice Cast Featurette Warner Bros. YouTube• Nov 8, 2011 While Mumble's struggle was about dancing, Erik discovers

and Matt Damon as Will and Bill the Krill, providing a humorous subplot about their place in the food chain. While Mumble's struggle was about dancing