Sue Schell, also known as Susan Shell, is a Swiss-American singer. She was a part of a trio along with her friends Peter Reber and Marc Dietrich, and they entered the Eurovision Song Contest together four times, in 1971, 1976, 1979 (with Pfuri, Gorps and Kniri), and 1981, before they chose their own paths that year. The trio performed in a different language each time. She was only 14 years of age when Marc Dietrich found her vocal talent and became friends with her. He introduced Schell to his friend Peter Reber, and together they formed "Peter, Sue & Marc".