Motown singing legend Smokey Robinson has been accused of sexual assault by four women who used to work for him, according to a workplace harassment complaint filed Tuesday at a Los Angeles courthouse.

The 85-year-old Motown star performed for an adoring crowd and made no mention of the claims against him at his first concert since being named in a lawsuit.

Lawyers for four former housekeepers of Smokey Robinson filed a lawsuit against the singer and his wife on Tuesday.