Wikifoodia: She turned herself from a heavy woman into a svelte and glamorous one after a mid-career weight loss, which might have contributed to her vocal decline and the premature end of her career. The press exulted in publicizing Callas's allegedly temperamental behaviour, her supposed rivalry with Renata Tebaldi and her love affair with Aristotle Onassis. Her dramatic life and personal tragedy have often overshadowed Callas the artist in the popular press. However, her artistic achievements were such that Leonard Bernstein called her "the Bible of opera";[2] and her influence was so enduring that, in 2006, Opera News wrote of her: "Nearly thirty years after her death, she's still the definition of the diva as artist—and still one of classical music's best-selling vocalists."[3]