I got a couple of e-mails alerting me to this movie's appearance on TCM last night, so I couldn't resist taking a look. It's pretty bad, but no movie that features Technicolor, an alligator, and a Diana Dors bubble bath scene can be all bad.
Donald Sniden plays a musician who gets his suitcase mixed up with one containing the titular gator. Complications ensue, but they aren't particularly amusing in spite of all the famous faces (Stanley Holloway, Stephen Boyd, Margaret Rutherford, etc.) involved. The musical numbers are uninspired, and there's really no question of whether Sniden will wind up with the blonde Dors or the redheaded Jeannie Carson.
Still, if you're a gator fan, you have to watch. Daisy is a fine (and amazingly docile) performer, though the occasional rubber substitute is one of the worst fakes in movie history.