Continuity mistake: When Mario walks over to the pool and informs Claudia about a long-distance call, a table with a closed umbrella is visible in the foreground with three red chairs surrounding it. But a few moments later when Klaus is being thrown back and forth around the pool in his deflating armchair, an overhead view of the same table shows only one chair next to it. (00:31:05)
Continuity mistake: When Klaus signals for the hot air balloons to lift off, Simon is still on the ground reluctant to participate in the race. But soon he catches up to his team's basket and clings to the side right below its sand bags. But just a couple of shots later when Simon remarks "Why didn't I think of that!", all of the sand bags are gone. (00:15:40)
Continuity mistake: When Brittany and Alvin are first shown playing the hot air balloon arcade game, they're holding its joysticks with their right and left hands, respectively. But in the next shot where the rest of the Chipmunks and Chipettes are shown cheering on, both players are suddenly using their opposite hands to control the balloons. (00:04:20)
Continuity mistake: During breakfast, the phone rings and Alvin sprints across the kitchen to fetch it. It's just Theodore playing back a doctored recording of Dave meant for Miss Miller to hear. So Alvin hands her the phone and listens nearby. Suddenly Theodore messes up by hitting the reverse button instead, and Miss Miller seems puzzled. In the next shot where Alvin panics, look in the background: now there's no cord hooked up to the phone. (00:12:35)
Continuity mistake: During the full moon sacrifice, Alvin, Simon & Theodore are tied up to stakes and suspended in thin air on a boulder, which seven ropes are fastened to. But down below at a different angle, where alligators are gathering, only six ropes are holding them up now. (01:01:05)
Continuity mistake: When Alvin leads everybody to a luggage chute in the airport, he's shown wearing a blue backpack - and he appears to have lost it upon reaching the baggage carousel area. After bumping into Klaus and Claudia he manages to get away with the others, but in one of the following shots his backpack suddenly reappears strapped over his shoulders again. (01:06:35)
Continuity mistake: After Miss Miller narrowly dodges a head-on collision with Klaus and Claudia's Rolls Royce, she kicks open her door and steps out onto the highway shouting, "I hope you have insurance, buster!" In the following shot, Miss Miller walks towards the Rolls Royce - but now her door is suddenly closed. (01:09:55)
Continuity mistake: When the Chipmunks and Chipettes are singing "The Girls of Rock n' Roll" in Athens, Alvin starts the second verse by grabbing a small 4-string harp from a nearby statue. In the very same shot he begins to strum it like a guitar, but now one of the strings is missing. Just a couple of shots later, Alvin is dancing in front of Simon & Theodore and playing the same harp - only this time it has five strings instead of three. (00:35:50)
Continuity mistake: In the "Wooly Bully" scene where Alvin, Simon and Theodore are suspended on a boulder jammed with elephant tusks above alligator-infested waters, all of the ropes get torched and they eventually drop down. But when the boulder smashes the head of an unlucky gator below, notice how all of the tusks have disappeared. (01:03:55)
Continuity mistake: When Jamal and Dave's cruiser is pursuing Klaus and Claudia through the city streets during "Diamond Dolls," you can see that it has a particular sequence of flashing beacon lights up top: a pair of red lights above the driver's side and a pair of blue on the passenger's side. But pretty soon there's a crash at the four way intersection and, once they notice it, each pair of colored lights has switched sides temporarily. (01:08:25)
Continuity mistake: When Klaus and Claudia greet the Chipmunks and Chipettes at the airport after the girls' balloon lands on the ground, Alvin threatens them with a harpoon having two red feathers attached near the tip. But in the next shot no feathers are hanging from the harpoon, and the balloon temporarily changes to the chipmunks' balloon. Suddenly Simon notices a garbage hatch on the plane and grabs the harpoon from Alvin, but now there are two green feathers on it instead. (01:05:55)
Continuity mistake: When the Chipmunks and Chipettes are nearing the airport, they turn around and notice a plane approaching. Stuck to their balloon's basket are several harpoons, but as the plane's wing sends the balloon careening towards the ground, all of the harpoons have vanished. (01:05:35)
Continuity mistake: About 10 minutes into the movie, the chipmunks and chippettes first meet Claus and Claudia. Claudia is wearing a pink outfit, so to match, she is wearing pink lipstick and nail polish (when she and Claus are sitting together). But when they do meet the chipmunks, her lipstick and nail polish turn red and stay red for the remainder of the scene.
Continuity mistake: As Claudia pedals on her stationary bicycle, a call comes in from Mexico. So she picks up the phone and you can see how a cord is attached near the microphone. When the shot changes to Klaus tanning in his booth, Claudia is visible through its window - but now she's talking on a cordless phone instead. (00:23:55)
Continuity mistake: When Alvin and Brittany are in Athens, they start arguing over who's the hottest act in rock and roll. Notice how he's standing next to a green stool in front of some wooden containers loaded with grapes and apples. But after Alvin says "No you don't!", Brittany loses her cool and walks over to challenge him. However he's suddenly off-screen somewhere and nowhere near the fruit stand. (00:34:10)
Continuity mistake: When you first see the arcade that the kids are playing you can see the Chippettes are winning on the map and they are going through Asia, but when you see it again a few shots later, they are flying around Europe.