Audio problem: When Cheech and Chong are being questioned by the officer at the border, the officer says "you got any narcotics, any marijuana in here?". His lips continue moving but we can't hear him. (00:45:45)
Audio problem: Near the end of the movie when the band is playing the song for the guy in the limo when shes singing the chorus to the song the voice changes from the original song to her voice.
Audio problem: As George sings, "I'm happy just to dance with you" four girls stand next to Paul and Ringo as their boss comes out yelling at them to get back to work. If you look at Ringo, his drumming is in perfect sync with the song but Paul's bass playing is not. (00:54:35)
Audio problem: In the opening scene the camera shows a close up of "Bumper singing please don't stop the" (repeatedly) then pans to the Bellas off stage. His singing doesn't match the audio. In fact several times during that performance there is audio of him singing but his mouth is not moving. (00:01:30)
Audio problem: When they are playing "Whiplash" it shows a hand playing piano. When the hand is going up the piano (to the right) the music goes up, then down. Going up the piano should only play higher notes. (00:18:20)
Audio problem: During the dream sequence in the song, Lulu begins swinging from three different stars depicting 3 different faces of celebrities at the time in black and white that have their lips moving with the song as they sing. However their lips are off sync with the lyrics by a little bit and are moving slower. (00:04:25)
Audio problem: When the country music singer tells Parker that Elvis can sing his songs "but no wiggle" there's a side shot of his face and his mouth doesn't match what he's saying.
Audio problem: When Drosselmeier and his fellow adviser, the astrology scholar, run into Drosselmeier's cousin and are presented with the Crackatook nut, the scholar snatches it and then exclaims, "it is a Crackatook nut!" After he finishes saying that, his mouth continues to move for an extra syllable that looks like he says nut twice.
Audio problem: When Evan plays the guitar the first time, you can hear some chords and notes that aren't actually being played at all.
Audio problem: When Loretta is recording her first record, you hear the snare drum being hit on the drum head but the drummer is actually doing a rim shot.
Audio problem: In Notes II, Madame Giry voice is out of sync as she says,"Fear his fury.".
Audio problem: When the Spice Girls are in the hospital room with Nicola, talking about what it feels like to give birth, Mel B says "Oh" but her mouth doesn't move.
Audio problem: In the end of the movie when the band plays during their wedding, watch the drummer. The drummer is playing something different than what you hear.
Audio problem: When Brian is rehearsing with his band, the flautists are heard playing whilst their instruments remain on their laps. (Moments later, the same phrase is repeated, but this time the flautists are playing it).
Audio problem: When the Police play "Roxanne" for Hilly, the actors are just lip-syncing to the studio version; though his laugh has been edited out, the atonal piano chord at the beginning of the song, a now-famous gaffe from when Sting accidentally sat on a keyboard during recording, still remains.
Audio problem: When the black cat slides Jerry down the piano, he slides Jerry from the right of the keyboard to the left of it. But the sound of the notes appear to be going from low to high.
Audio problem: During Beca's performance of Freedom, she is singing with Cynthia Rose. During the little chorus pre-verse (before they put their hands in the middle), you can hear Beca's voice singing the lyrics but Anna Kendrick's microphone is nowhere near her mouth. Her lips don't even match it.
Audio problem: While Sal and Eddie are at the old boarded up church, Sal tries to convince Eddie that he's not responsible for Wendell's death, and when we hear Sal say, "Don't worry about being good enough," his mouth is saying something else.
Audio problem: The sounds of Winslow walking up the stairs aren't synchronized with the movements.
Audio problem: In the very first scene of the movie when Bobby is recreating his performance at the Coconut Grove, the actions of the band are out of sync with the music we hear. (Bobby is in sync, but the band is not.) Watch the hands of the drummer and the band leader: The entire scene is out of sync, but when the drummer moves to the ride cymbal you can easily see he is ahead of the music, and when the band leader gives the band cues for accents, his hand movements are behind the music and therefore happen too late.