As Keith Urban neared the end of his set, they could see the tears falling down his face. The lights softened, and behind him, a montage of home videos played: Keith laughing with his daughters, holding Nicole Kidman close. Across the screen came the words: “Happy Father’s Day, Daddy.” Nicole then stepped into the spotlight with Sunday Rose and Faith Margaret, each holding a white lily. “You’re our hero, Dad,” Sunday said. Nicole’s hand rested warmly on Keith’s back as he picked up his guitar, h