NEW YORK — Jay-Z, Dead & Company and the Killers will headline one of the 50th anniversary shows commemorating the groundbreaking Woodstock festival this summer.Woodstock co-founder Michael Lang announced Tuesday that Miley Cyrus, Santana, Imagine Dragons, Robert Plant and The Sensational Space Shifters, the Black Keys and Chance the Rapper will also perform at the Woodstock 50 Music and Arts Fair, which will take place Aug.