Continuity mistake: When Father McFeely arrives at Hell House, Megan's Mother opens the door, and he walks forward and raises his hand to his hat. Then in the next behind shot his hand is down but in the next shot his hand is on his hat again, and he then takes his hat off. (00:01:55)
Continuity mistake: When Cindy is driving along, singing, both of her windows are rolled down about halfway. We can see the window next to Cindy is rolled down halfway in the first two closeups of Cindy. It then cuts to a wideshot of the car and then another closeup, and the window is now fully winded down. Cindy clearly never winds the window down, it has just rolled down between shots. (00:13:40)
Continuity mistake: When Buddy runs up to Cindy in the school passageway with the book, you can see that it is a "windows for dummies" book (or something similar), when he hands the book to Cindy, it suddenly changes to the Harry Potter cover. (00:12:50)
Visible crew/equipment: When the characters are spoofing "Charlie's Angels", you can see the studio roof in several shots. (01:05:10)
Continuity mistake: When Brenda and Ray are in bed and Ray says "Let's do something freaky," we can see Brenda's hand on Ray's shoulder. When it cuts her hand is gone. (00:31:55)
Revealing mistake: When Dwight flies into the banister in his wheelchair, after colliding with Hugh, from a back shot you can see marks made previously in the wood to make the banister break in those parts, more easily. (00:58:45)
Audio problem: At the spoof of Charlie's Angels, Cindy begins to fly through the air, screaming. When she sees Hanson with the baseball bat, she screams 'OH, NO.' her mouth doesn't move an inch when she says 'No'. (01:05:00)
Continuity mistake: In the scene after the main female characters portray Charlie's Angels, they go back to where the guy in the wheelchair has set up a pad that Cindy has to lure the ghost into, from one shot to the next (when Cindy goes to lure the ghost) Cindy's lipstick colour changes instantly from red to beige although her clothes stay the same. (01:08:55)
Continuity mistake: When Megan is in bed (not the vomit scene), her hands are tied. But when Father Harris begins to pray "Holy Lord. Almighty Father", it's quite obvious that Megan's hands are untied. When it cuts her hands are tied again. Her hand is also suddenly untied when she says "Your mother sucks # in Hell". (00:05:35)
Continuity mistake: When Father McFeely reads from his bible while on the toilet, in shots of him, a table with three books on it can be seen. Between shots the books on the table change their position. (00:03:00)
Continuity mistake: When Father McFeely arrives at the Hell House in the cab, the cab parks right next to a light pole. Between shots the position of the cab in front on the light pole noticeably moves. (00:01:55)
Continuity mistake: In the scene before everyone puts on thier goggles, Tori Spelling is wearing a blue T-shirt and jeans but in the next scene, she is wearing a purple T-shirt and purple pants. (00:45:00 - 00:46:10)
Revealing mistake: At the beginning, when the girl is driving down the road, there are leaves on the ground, but the leaves in the trees look green. Passing one of the bushes on the road, the leaves are blowing from directly behind the bushes, where a fan must be hiding. (00:14:15)
Continuity mistake: During the scene where Cindy is talking to Buddy in the college hallway, her backpack straps alternate between shots. In some shots she has both straps up, and in others one strap is up and one strap is down. (00:13:00)
Continuity mistake: When Father Harris' lips are stuck to the crucifix he is trying to pull it loose with his right hand. When it cuts he is pulling it with his left hand. (00:04:55)
Continuity mistake: When Cindy first meets Hanson, the big knife Hanson holds changes angles in his hand between shots. (00:15:50)
Continuity mistake: For the entire movie, the main female character has a French manicure with long nails. But when they are spoofing "What Lies Beneath" and she lays her professor down on the table, she has short natural nails. (00:14:10 - 00:37:30)
Continuity mistake: Cindy is driving to Kane Manor, and she's singing along to a song. Then the song tells Cindy to shut up. After this Cindy goes from holding the sides of her steering wheel, then the top of the wheel, then back to holding the sides between shots. (00:14:00)
Continuity mistake: When Cindy is driving along, singing along to a song in her car, in wide shots of the car, you can see the road she drives down has a white fence running along both sides of the road. But in shots of Cindy in her car, a white fence should be visible, but isn't there. (00:13:35)
Continuity mistake: When Shorty's plant is growing we can see its leaves going over the edge of the pot its in. When it cuts to the pot cracking no leaves are in sight. (00:39:10)
Answer: I want to know this so badly as well and can't find it. The Graduation Song is not right.