Rhythm on the River - and the incomparable Oscar Levant

If you want to see some good piano playing, watch Rhythm on the River. It stars Bing Crosby and Mary Martin, with Basil Rathbone in a prominent role, and has an enjoyable plot. However, the show is almost stolen by pianist and caustic wit Oscar Levant. They feature several spots of him playing live in the movie, and they are great.