Rascal Flatts chats with ET's Cassie DiLaura on the red carpet at the 60th Annual Academy of Country Music Awards. The band reacts to dueting their song, 'What Hurts the Most,' with Backstreet Boys and the idea of collaborating with more boy bands. The 60th Annual Academy of Country Music Awards stream live on Prime Video from Frisco, Texas, on May 8. Source