Deliberate mistake: When the father hands the porno mags to his son, if you look real carefully, you can see the son hide one of the covers from the camera with his hand. (00:25:39)
Continuity mistake: When Stifler's mom seduces Finch, you can clearly see Finch playing with the balls on the pool table. The camera cuts to another shot, and when it's back to Finch, the balls are back in the original place. (01:20:13)
Question: Does anyone know the name of the song near the end of the movie, just after the prom, when they're all kissing?
Answer: The song is called Sway by Bic Runga.