The Mary Jane Girls were an American R&B, soul, funk, disco, and pop group in the 1980s. They were protégées of singer Rick James. They are best known for their 1985 hit song, "In My House". The group consisted of four female members, Joanne "JoJo" McDuffie (lead vocalist), Candice "Candi" Ghant, Kimberly "Maxi" Wuletich, and Ann "Cheri" Bailey. JoJo was the only member to sing background for Rick James. This was to be JoJo's solo project but, Rick sold it to Motown as a group. The "Mary Jane Girl Sound" was created by JoJo and session singers the Water Sisters (see last MJG compilation liner notes). The other members were very limited in their vocal abilities as the band sang for them on tour and tape was used for television performances.

The origin of the group's name is commonly believed to be an homage to James' affinity for marijuana, which is sometimes called "Mary Jane." The four group members took on distinctive character looks with matching personalities:

* Joanne "JoJo" McDuffie (lead vocalist) – Sexy and streetwise.
* Kimberly "Maxi" Wuletich – leather queen/dominatrix.
* Candice "Candi" Ghant – Model/Vamp.
* Ann "Cheri" Bailey – Valley girl/cheerleader.