With Memorial Day in our rear-view mirrors, the unofficial start of summer has arrived. It's hard to believe May has come and gone. Before you know it, it will be time to pack your bags for the CMA Music Fest in Nashville! But let's not get ahead of ourselves: Last month brought us some damn fine new music that shouldn't be forgotten. From icons (Carrie Underwood, Willie Nelson) to beloved mainstays (Marty Stuart) to soon-to-be favorites (Hurray for the Riff Raff, Wade Bowen), there's something for everyone in this edition of the Country Roundup.