Little Shop of Horrors didn't always have the happy ending you may remember if you only saw the 1986 movie. Originally, the movie had the same ending as the stage musical. Spoiler: Basically, everybody dies. Everybody. Test audiences felt that ending was too depressing and the studio rushed to shoot a new, happier finale.
The workprint of the original ending was included as deleted scenes on the film's first DVD release, but those copies were pulled from shelves due to the clips in question not looking or sounding very good.
Now the blu-ray is out and it contains a director's cut featuring the restored original ending.