Def Leppard & Heart will be preforming this Sunday at Darien Lake Performing Arts Center at 7:30 pm. Don't be surprised if you hear some new songs from Def Leppard because they have a new album out "Mirrorball" with their old hits that they play live, and they also have 3 new studio tracks: "Undefeated", "Kings Of The World", "It's All About Believin." Check out "Kings Of The World"