Throwback Pics: Behind the Scenes at the Academy of Country Music Awards

A new book, This Is Country, offers an exclusive peek at 50 years of the show's most memorable moments

LUKE'S BIG MOMENT

Luke Bryan couldn't hold back the tears when he won the Entertainer of the Year award in 2013. "Being a part of that moment is still something I think about every day and I can't believe it happened to me," Bryan says.