Which movie is the quote 'Just Keep Swimming' from?

The famous movie quote "Just Keep Swimming" is from Finding Nemo.

This line is spoken by Dory, who was voiced by Ellen DeGeneres, and the movie is directed by Andrew Stanton and Lee Unkrich in 2003.

In this scene, Marlin is arguing with Dory which causes her nose to bleed, which is really bad timing with sharks nearby. So they get out of there quickly, however, they accidentally drop the diver's mask which it's the only thing that will lead them to Nemo. Marlin (Mr Grumpy Gills) thinks he will never see his son Nemo again. So Dory has a fish-to-fish talk with him. This is where she sings, "Just keep swimming, just keep swimming, just keep swimming, swimming, swimming."