HAPPY BIRTHDAY! Country star Luke Bryan celebrates another year as one of the biggest names in country music. From "Country Girl (Shake It for Me)," "One Marga

HAPPY BIRTHDAY! Country star Luke Bryan celebrates another year as one of the biggest names in country music. From "Country Girl (Shake It for Me)," "One Margarita," "Play It Again," "That's My Kind of Night," and "Huntin', Fishin' and Lovin' Every Day," Luke Bryan has become one of country music's…