Come Blow Your Horn
Starring Frank Sinatra, Lee J. Cobb, Molly Picon, Barbara Rush, Jill St. John, Dan Blocker, Tony Bill, Phyllis McGuire, Mary Grace Canfield, Herbie Faye
It's a comedy and musical movie, and has a rating of 6 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Belgium.