What do you get when you mix classic pop, Broadway, the Great American Songbook, originals, jazz royalty and two voices raised in harmony? Well, one thing is the July 1 appearance by Kevin DiSimone and Hilary James at The Homestead. The next entry in Music on the Mountain series features the husband-and-wife couple who separately and/or together have worked with—deep breath—Barry Manilow, Carly Simon, Elton John, Stevie Wonder, Luther Vandross, Bette Midler, Willie Nelson and Billy Preston. You want more? Throw in Sam and Dave, Peter Nero, Quincy Jones, Eddie Arnold, Cybill Shepherd, Mickey Rooney, and Dudley Moore. And don’t forget Bob James. They won’t, as he’s Hilary’s father and Kevin’s father-in-law.