A maybe on this one -- but the "MA' is very rushed yet the "DONNA" is much neater/fuller. So many fakes on her - Kamran (a member on this site) is the best on her sig.
I dont think it's street. I think it maybe a promotional signature, for Sires (Warner Music). I have seen a few of these signed promotional photos around from the vogue era circa 1990, that are similar. But this does look a little too good to be true. Very neat.
Similar promotional Sire photos go for over 2000 on R&R these days when they do appear.