Sometime during 1990 and/or 1991
Lita Ford (vcl); with some others incl. Joe Lynn Turner (bvc).
Turner did some backing vocals on Lita Ford's Dangerous Curves album. On the album, there's also a track called "Little Too Early" written by Turner/Blakemore.
Albums & singles
Dangerous Curves [cd] : US 1991 RCA Records 07863-61025-2