The Mary Jane Girls were an American R&B, soul, and funk group formed in the early 1980s. The group was produced by Rick James and signed to the Motown label. Notable members included Joanne 'Jojo' McDuffie, who was the lead singer on most of the group's hits, and Maxi Wuletich, known for her sultry vocals. The Mary Jane Girls were known for their distinct sound that combined elements of R&B, disco, and pop, and they made significant contributions to the 80s music scene with hits like "All Night Long" and "In My House."