Peter Allen was an Australian singer-songwriter, musician, and entertainer, known for his flamboyant stage persona, energetic performances, and lavish costumes. Allen's songs were made popular by many recording artists, including Elkie Brooks, Melissa Manchester and Olivia Newton-John, including Newton-John's first chart-topping hit "I Honestly Love You", and the chart-topping and Academy Award-winning "Arthur's Theme " by Christopher Cross.