Rhythm & blues singer from New Jersey with vocal group The Suburbans. They were once support act for Muddy Waters. That's when Muddy heard it first. Both cut it somewhat simultaneously. Cole had the bigger hit initially but Muddy's version was better distributed. His lyrics are slightly different; he probably didn't remember the original ones while recording his. Most later covers follow his. Conclusion: cut your songs before singing them in public. Later Ann cut answer song I've Got Nothing Working Now (But My Real Old Fashioned Love), co-written by Preston Foster and it's Buzz Buzz A-Diddle It chorus probably inspired others (see there). Besides, Ann's mojo sure didn't double for a Saint Christopher; she was paralyzed in a car crash. Preston Foster's demo was for Dare Records.
Muddy Waters [charted the same week as the original; crediting himself]
Larry Bright [as Mojo Workout; author/producer Ruth Stratchborneo sued unsuccessfully; she claimed singing Got My Mojo Working as early as '55]
Kingsmen [as Mojo Workout]
Paul Revere & The Raiders [idem]
Claude Righi [as Laisse moi seul]
Bill Cosby [as Mojo Workout]
Elvis Presley [see also: Hands Off]
J.J. Cale [as Mo Jo]
A mojo is a voodoo devise helping a man finding a good woman or vice versa. Not a mannish thing to rave about, for if he needs a mojo means his natural charms ain't working. Reason to believe a woman should sing it in the first place. See also: Keep Your Hands Off My Mojo.