Watch all of Doris Day's movies in chronological order (minus the ones that aren't available on DVD yet or never show on TCM).
This weekend it was Romance on the High Seas. Doris' first movie and the only movie she smokes in (See comments). She was actually a heavy smoker in real life until her late 20s which is so surprising to me. She really does have a goody goody image even to those of us who didn't grow up with her.
I like this movie. The songs aren't great, but Doris is certainly fun to watch in this one--alternating between high society and nightclub singer persona. She really was a natural in front of the camera.