Trying to figure out the name of a movie Seen about 1995-2000 about a group of teenagers on prom night dressed like they are from the 1960s who died on prom night I think in an auto accident and then come back later as ghosts? Trying to find out name of that movie.

Perhaps one of the two movies listed here:

https://www.askmehelpdesk.com/movies/90s-disney-girl-who-dies-way-prom-power-rangers-actor-355050.html