The world renowned Harlem Gospel Choir is the latest (but by no means the last) addition to the Jammys. The nature of their performance (and in particular the identity of the musicians who will join them) will remain a mystery until the night of the show, although it is safe to say that the pairing will involve some of the 25+ artists already announced for the event. The Jammys will take place on Tuesday March 16 at the Theatre at Madison Square Garden, and while voting for the awards has closed, tickets can be purchased via TM on-line or without service charges at the MSG and Radio City Music Hall box offices.