Eydie Gorme, the lively singer with a remarkable range who performed a decades-long act with her husband, Steve Lawrence, that made them the sweethearts of mid-20th-century American pop music, died on Saturday in Las Vegas. She was 84. ... Ms. Gorme and Mr. Lawrence had a sophisticated stage presence and vibrant voices, but they stood out for two other reasons. As rock ’n’ roll conquered pop music, they refused to join in. Instead, they stood resolutely with the standards, performing the songs of Cole Porter, Irving Berlin, the Gershwins and Rodgers and Hammerstein. ... “Eydie has been my partner onstage...