Yes, you hard for Little Shop of Horrors, the iconic musical. There is also the same movie with a young Jack Nicholson in a small role.
Because director Corman did not believe that The Little Shop of Horrors had economic prospect film was released without copyright and today is in the public domain.
Download movie link: https://en.wikipedia.org/wiki/File:TheLittleShopOfHorrors1960.webmhd.webm