"Undecided" is a spirited jazz standard composed by Sid Robin and Charlie Shavers in 1938. The song quickly became a popular tune in the jazz scene due to its catchy melody and playful rhythm. Django Reinhardt recorded a memorable version with the Quintette du Hot Club de France in 1939, highlighting his virtuosic guitar playing and the group’s dynamic gypsy jazz style. Reinhardt’s improvisational skill, paired with the ensemble’s intricate harmonies and rhythmic drive, brought a fresh energy to the tune, cementing it as a classic in both the swing and gypsy jazz repertoires.