Summarily: three polymorphic aliens leave their prudish planet for Earth in order to be Rock'n'Roll Babes; they land in Sydney among slackers; comic misunderstanding marks time until the final Dionysiac concert flummoxes the pursuing parental figures. I'd say it was a standard teen movie but with more sex, but I don't know how much sex teen movies are currently allowed.
ISBN: 0-7679-0165-7
So wrote clew in
SF&F.