Is Cee-Lo a real life closet freak? While that remains to be seen, Cee-Lo is being investigated on a sexual battery accusation. A woman claims the Goodie Mob frontman slipped a drug in her drink at a L.A. restaurant in July. The victim says she found herself naked in bed with him the next morning.

Sources involved in the case represent to TMZ  … Cee Lo is on tape, repeatedly apologizing and referencing MDMA (Ecstasy) — though he does not specifically say he put it in her drink.  Sources say Cee Lo told her he thought the drug would help them have an exciting time together.  For the record, MDMA generally does not render people unconscious.