As you'll remember, in the first Happy Feet, the emperor penguins of Antarctica express themselves primarily through song, and frowned upon dancing, until one of them, a kid named Mumble (voice of Elijah Wood), taught them the power of dance. The sequel begins with Mumble now happily married to Gloria (Alecia Moore, aka Pink), and the whole tribe cheerfully singin' and dancin' all the live-long day. Sadly, Mumble and Gloria's shy little hatchling, Erik (Ava Acres), doesn't dance. And he feels like an outcast because of it. 

Meanwhile, in the part of Antarctica where the penguins have Latino accents, our feisty friend Ramon (Robin Williams) is trying to woo a sexy new female, Carmen (Sofia Vergara). Also, an exotic new penguin named Sven (Hank Azaria) has arrived. He has a Scandinavian accent and can fly! A penguin who can fly! He looks suspiciously like a puffin, not a penguin, but does that really matterr? Anyway, Ramon is jealous of the attention received by the glad-handing, Sven.

Meanwhile, in the ocean are two tiny krill named Will (Brad Pitt) and Bill (Matt Damon). Will wants to leave the massive krill swarm and "live a little." He and Bill flit in and out of the rest of the film, occasionally intersecting with whatever the main plot happens to be at the moment, and sometimes seeming like they're in their own movie altogether.

Meanwhile, a shifting ice formation has trapped all the emperor penguins in a giant valley, preventing them from accessing the sea and thus food. It's up to the handful of their kind who weren't home when it happened, to help them get out and find a new site for their colony. Happy Feet Two is consistently amusing, sometimes deliriously fun, with slick and vibrant animation. It has upbeat messages about helping one another and the value of every individual. The musical numbers are primarily existing pop songs but others have been written for the film. These are made even catchier by the addition of that toe-tapping, synchronized choreography.