Continuity mistake: When Maleficent places the glasses on Beast's face, their position keeps changing all the time.
Continuity mistake: When Bill and Chris Rock are singing on stage, during the line when Chris is saying "A voice as big as the sea" the camera fade cuts to a different angle while he's saying this line in what's supposed to be a live show. But his face and mouth are in very different positions between these fade cuts. And this happens several more times through the song with these fade cuts.
Continuity mistake: After the shooting at the concert, Lysistrata is in the bathroom downing the pill with some Don Julio tequila. The bottle lid is to the left of the bottle in the wide angles, to the right in close-up. (00:10:00)