This rare 1966 single is collected mainly for the uptempo Northern Soul track on the B side. Curiously, Calla released the B side on another Calla 127 single with "I Only Have Eyes For You" on the A side. Clearly someone didn't get that "What Shall I Do" should have had top billing! Collector Nerd Alert: The other Calla 127 version of "What Shall I Do" is 20 seconds longer and apparently has a "Rap" beginning. In any case, this was a non-album single. Note: This beautiful copy has Near Mint labels with a touch of wear. The vinyl has some storage wear, grading a strong EX in appearance. The B side audio has light underlying surface noise, but honestly the music drowns it out almost completely, so I'd call the B side Near Mint sound. On the A side, the surface noise is a bit more noticeable, grading a strong EX.