They added real penguins squalking to make it sound worse! 
Elijah Wood's traded in hairy hobbit feet as Frodo Baggins for funky flippers as Mumble, the vocally-challenged penguin. Robin Williams and Brittany Murphy also give their vocal chords a workout as plucky penguins with soul in new musical animation Happy Feet. Here, the lively bunch enthuse about the movie and the joy of song.
听听
Happy Feet is released in UK cinemas on Friday 8th December 2006.
