Exclusive Clip: Watch Laura Bell Bundy Sing New Song, “Grass Ain’t Greener,” From Upcoming “Pure Country” Movie The third installment of the “Pure Country” franchise—“Pure Country: Pure Heart”—will be released on DVD/Blu-ray on Aug. 1. Featuring Willie Nelson, Laura Bell Bundy and former WWE wrestler Shawn Michaels, “Pure Country: Pure Heart” is the music-driven tale of teenage sisters who leave rural Tennessee and hit the road in search of the truth behind their late father's budding country mu