Pixar: One Man Band

This's the most hilarious among all the Pixar shorts I've seen so far... And the characters are so cute!

From Wikipedia

One Man Band is Pixar short film. The film made its world premiere at the 29th Annecy Animation Festival in Annecy, France, and won the Platinum Grand Prize at the Future Film Festival in Bologna, Italy. It was shown with the theatrical release of Cars.

The short was written and directed by Andrew Jimenez and Mark Andrews and produced by Osnat Shurer, head of Pixar's Shorts group. The score for the short was written by Michael Giacchino, who also composed the score for Pixar's animated feature film Ratatouille.

Like many Pixar shorts, the film is completely free of dialogue, instead using music (played by the characters) and pantomime to tell the story.

On January 31, 2006 it was nominated for the Academy Award for Animated Short Film, but lost to The Moon and the Son: An Imagined Conversation by John Canemaker and Peggy Stern.