Continuity mistake: While Tai is in the livingroom, Cher and Josh are in the kitchen as Josh fixes himself a turkey sandwich. When they reach the livingroom doorway he's taking a bite out of it as he holds the sandwich is in his left hand, but next shot it's in his right as he continues taking a bite.
Continuity mistake: When Josh is taking Cher driving for the first time and Josh says "This is America we drive on the right side of the road." You see him saying that and then there is a cut of Cher and you see the curb like it's right next to her but you also see the curb right next to Josh - could be a one lane street but when they show you the car it is a 2 lane street.
Continuity mistake: At the party Tai, Cher, Josh and Christian are at, Tai asks Cher what to do with her shirt and Cher tells her to tie it around her waist. The film cuts to the band and when it cuts back to Tai, she's wearing her shirt again. The film again cuts to something else and when it cuts to Tai she isn't wearing the shirt, nor is it tied around her waist.
Other mistake: When Tai is at Cher's burning all the things that remind her of Elton, she talks about how she likes Josh and how he danced with her at the frat. They never go to a frat. According to Dicky Barrett of the Might Bosstones (band in the club scene), it was originally scripted to be a frat party, but the band refused that setting, so they chose a club setting instead. This frat reference (where Josh dances with her) is actually referencing the club scene.
Audio problem: In the scene at the party when Tai sits up after Elton placed her on the table she hits her head on a light hanging overhead. The sound the bump makes is not consistent with someone hitting the light with their head in such a manner. It appears that it's just a sound effect added in. (00:37:30)
Other mistake: Near the start when Cher asks Tai how old she is, Tai says, 'I'll be 16 in May.' Then Cher says, 'Well, my birthday is in April, so as someone older than you...' But throughout the movie it is said that Cher is already 16. No birthdays are shown. You'd think that a rich girl in Beverly Hills would celebrate her birthday.