Two of Essex County’s most cherished artists—vocalist extraordinaire Bettye LaVette, 77, and bassist-composer-arranger-educator Christian McBride, 51, will join Aloe Blacc, Dee Dee Bridgewater, Paula Cole, Rachael Price and Brian Stokes Mitchell in “A Tribute In Song” February 8 on The Betty Wold Johnson Stage, Prudential Hall, within NJ PAC in Newark.