 Despite this it had great appeal and certainly caught on.The song was an immediate hit with the version by Fats Waller being the most popular.Other hit versions in 1938 were by Sammy Kaye & His Orchestra (vocal by Charlie Wilson), Kay Kyser & His Orchestra (vocals by Ginny Simms and Harry Babbitt), Bob Crosby & His Orchestra (vocals by Bob Crosby and Marian Mann), Hoagy Carmichael & Ella Logan, and by Lawrence Welk & His Orchestra (vocal by Walter Bloom).