So-Lo is the only solo album by Danny Elfman and was originally released in 1984. It was performed by members of Oingo Boingo, but deliberately not released under the Oingo Boingo name in order to circumvent a dispute with the band's record label.

The reissue features one bonus track, the original mix of 'Gratitude,' which was only released as a single and as part the Beverly Hills Cop soundtrack.