Just to clarify--if it's got space aliens in it, it's science fiction.
Which brings us to Lilo & Stitch.
What, you don't think so? "It's a Disney movie!" you protest. Well, try this on for fit, Thomas:
A genetically-engineered space alien designed to be an unstoppable force of destruction escapes its prison and steals a rocketship, crash-landing on Earth, where it is befriended in spite of itself by a lonely little girl who thinks it's a dog. Her patience and faith in him change him from a rotten little monster into a heroic figure as he saves the girl from the aliens who had been sent to recapture him.
Sure sounds like science fiction to me. And as an added bonus, there's hula.