Happy May Day readers, workers of the world unite! Rolling Stone reports: "Willie Nelson and Merle Haggard have teamed up over the years, from their 1983 classic "Pancho and Lefty" to their Last of the Breed album and tour with Ray Price, but as Haggard has said, they only do it when the material is right. The duo linked, though, once they heard "Django and Jimmie," a tribute to Nelson and Haggard's respective heroes, Django Reinhardt and Jimmie Rodgers (written by Jimmy Melton and Jeff Prince). "It pulled my heard right out," says Haggard. "I thought, 'That's a pretty good song.'""