Back to the Beach
Starring Frankie Avalon, Annette Funicello, Lori Loughlin, Tommy Hinkley, Demian Slade, Connie Stevens, Joe Holland, John Calvin, David Bowe, Laura Urstein
It's a comedy and music movie, and has a rating of 5.9 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Italy.