Corrected entry: Why does Frenchie have a TV in her bedroom? Only really rich people had multiple televisions in the 1950's. (00:25:05)
Corrected entry: The first day of school the Principal invites everyone to the pep rally coming up. After the Pep rally that week all the Pink Ladies and Sandy go to Frenchie's for a party. At this party is when Rizzo leaves and her and Kenickie have their "accident." Yet Rizzo doesn't find out until the carnival at the end of the school year that she's not pregnant. That would have been one heck of a first trimester...
Corrected entry: In the dance scene at the school, Doody can't dance with Frenchy and apparently Jan has trouble dancing as well, but later on nobody seems to be having any trouble dancing.
Corrected entry: In the pep rally scene where everyone is rushing up to see what Coach Calhoun has to say, you can see a brown-headed girl rush forward, and then you can see a hand reach out and pinch her bottom.
Corrected entry: Just at the beginning of the Hand Jive dance off, Patty and Marty are standing in front of the big float figure. The hat tips and paper falls on both of them. In the next shot, as Patty is crying, Marty is no longer there, but there are a couple of guys next to Patty attempting to fix it.
Corrected entry: In the beginning credits, they spell Frenchie with an "ie" but at the end credits, they spell it with a "y".
Corrected entry: In the scene where Danny and Sandy rush into the diner, Sandy has a white cardigan draped over her shoulders which she places on the back of her chair. However, when they both leave in a rush she doesn't pick the cardigan up and you cannot see it either on the chair or on the floor.
Corrected entry: In the scene where the T-Birds pull up at Frenchy's the night of the slumber party, the front porch is all along the front of the house & there is nothing in the yard. But when Sandy goes outside and is singing Hopelessly Devoted, it's a small little corner porch and there is a swimming pool in the yard.
Corrected entry: At the race, Frenchy is heard asking Marty the question, "What did she give him?" but her mouth isn't moving- in fact, its chewing gum. A common misconception is that Jan is saying this line and not Frenchy, but the voice sounds exactly like Frenchy's and not at all like Jan's.
Corrected entry: In the dance-off scene, 'Crater Face' is standing between Doody and Putzie and talking to then in a friendly fashion. If they were enemies as the film suggests, surely they would want to avoid each other?