Continuity mistake: When the Minion dressed as a maid answers the door, there is nothing next to it. When the shot returns to the door after the Minion has been taken, a umbrella and a holder for the umbrella have suddenly appeared. (00:21:50)
Continuity mistake: Once Jack puts the beans in the ground, Jerry covers them up with dirt and pats it down flat. The dirt is perfectly level with the rest of the ground. Then Jack yawns and stretches, and it cuts back to Tom and Jerry. Suddenly the dirt covering the beans is a small mound sticking up with Jerry standing on it. (00:20:05)
Continuity mistake: When Emma finishes her performance after the big car chase, she jumps off the star and slides on her knees to the edge of the stage. It cuts to a much further back shot, and suddenly she is quite a ways away from the edge of the stage, back next to the star. (01:06:55)
Revealing mistake: As Elsa sings "Let It Go" she pulls her hair into a long braid going down her back. She pulls it with her left hand from behind her to in front, but the end doesn't flip over her shoulder, she just pulls it straight through to the other side without going over the top. (00:34:10)