It turns out that Ohad uses the choir of the Black Hebrews of Dimona for a lot of his background vocals. They sing on has latest album, along with performing with him at some of his "gigs".

I even know some of them from the softball league..

Here is a short clip of them singing with him at a bar mitzva.. you only see the Hebrews, not Ohad, and it is a short clip.. enjoy.