
Written in 1924 for the Broadway musical "Lady Be Good," which featured Fred Astaire and Cliff Edwards (aka Ukulele Ike), this song has become a very popular soloing platform for jazz instrumentalists, as it's easy to adlib over the changes. Consequently, there are countless recorded instrumental versions. This key-of-Eb version includes the introductory verse, which goes back and forth between the relative minor key (Cm) and Eb major, and wanders into the key of C major for four bars! The "trick" ending of the vocal and instrumental arrangements has an interesting series of descending chords (the bass notes go: A, Ab, G, Gb, F, E, Eb) that all have a high Eb note. This is not written into Gershwin's tune, it's just an ad-lib ending.