Olivia Newton-John was an Australian singer, songwriter, and actress, born on September 26, 1948. She gained fame in the 1970s and 1980s, particularly for her role as Sandy in the musical film Grease. Her music career included hits like "Physical" and "I Honestly Love You," earning her multiple awards. Throughout her life, Newton-John was also an advocate for health and wellness, especially after her own battle with breast cancer. She established the Olivia Newton-John Foundation to support cancer research and wellness programs. Her legacy includes both her artistic contributions and her commitment to health advocacy.