Influential jazz singer and guitarist Mary Kaye, who is credited with introducing the word "lounge" into the lexicon of Las Vegas shows and whose jazz trio helped pioneer all-night performances on the strip's secondary stages, has died. She was 83: Mary Kaye, 83; singer ushered in all-night lounge acts in Vegas. Born Mary Ka'aihue, her grandfather was Prince Kuhio, brother of Queen Liliuokalani, who was the last monarch of Hawaii.