"So Long" is a jazzy, acoustic blues song featuring Detroit blues legends Buddy Smith and Thornetta Davis. As a part of Drew Schultz's Back To Class project, 50% of the profits benefit the music programs of the Detroit Public Schools.

Buddy Smith is one of the many legends of the United Kingdom’s Northern Soul scene. In the 1960s he was a prolific performer around Detroit, releasing a single called “When You Lose The One You Love.” The song was written by Tony Clarke, who had contributed songs to artists including Etta James and David Ruffin, and arranged by McKinley Jackson, a Detroit staple whose work with Holland/Dozier/Holland, Chairmen of the Board, Freda Payne, and the Invictus/Hot Wax labels would continue to cultivate the "Detroit Sound” even after Motown Records had relocated to California. Buddy could not have guessed that, decades after the single’s release, the song would gain him notoriety among the Northern Soul crowd in England, where an original copy of his single would sell for 1,600 Britis