Listen to Ella Fitzgerald; Lambert, Hendricks and Ross; Keller Williams or the previously mentioned Bobby McFerrin.

Take into account that it can sound really, really good or reeeeaaalllly bad, depending on who's doing the singing much the same as a banjo, accordian, bodhrán, set of pipes and so on.

Take into account that you have to learn to use the voice properly.

I'd vote yes.

Rich