Continuity mistake: When Lilo is in her bedroom, and Nani brings her up a slice of pizza, Lilo wants to tell her a story. So she sets her doll down on the bed, and it appears to be right in front of the pillow. Then the shot changes, and the doll is down past Lilo's legs, closer to the wall.
Continuity mistake: In the Hula lesson at the beginning of the film the two men in the corner seem to be tapping yellow drums shaped like bowling pins, yet when Lilo makes her comment about Pudge the fish controlling the weather it cuts to the men for a reaction and the one on the right appears to be holding a large red normal shaped drum.
Continuity mistake: In the dance school scene, the older girls are wearing some type of calf length white pants under the grass skirts. When the fight between Lilo and the red haired girl breaks out, the older girls no longer have the pants at all.
Continuity mistake: In the beginning of the movie, a few seconds after Lilo attacks Myrtle, all the girls, including Myrtle, gather behind the director. Myrtle's bracelet of leaves is still on. Then when it cuts to her, Myrtle says, "Ew, she bit me." and the bracelet is gone.