Among those joining Brown at the State Theatre will be veteran soul man Peabo Bryson, who was the '80s king of the slow-jam duet, notching hits with Roberta Flack, Melissa Manchester, and Natalie Cole. Brenda Russell, meanwhile, may be best known for her Grammy-winning 1988 single "Piano in the Dark," but that success masked a long career writing for and performing with the likes of Barbra Streisand and the late Luther Vandross. And Everette Harp, a saxman with roots in both R&B and gospel, also had a long list of sideman credits (Anita Baker, Kenny Loggins) before going solo in the '90s with his own brand of sweet, sensitive jazz.