Gaby Gibson of Queens filed a civil suit in Manhattan Supreme Court seeking compensatory and punitive damages.
Gibson claims the 36-year-old Campbell whacked her in the head with a cell phone because she couldn't find a pair of Campbell's Stella McCartney jeans.
The woman needed four stitches in her head after the incident, prosecutors have told Manhattan Criminal Court, BBC News reports.
The maid claims the attack occurred Jan. 17, just two months before Campbell was arrested for allegedly beating Gibson's replacement with a crystal-encrusted BlackBerry, New York Daily News reports.
Campbell pleaded guilty to a 1998 assault charge in Canada for beating assistant Georgina Galanis with a telephone.