Mary Susan Applegate, born on May 2, 1955, in the United States, is a renowned American songwriter, poet, and lyricist based in Frankfurt am Main, Germany. She gained significant recognition in 1984 with the lyrics to the multi-platinum hit "The Power of Love," which became a number one hit for Jennifer Rush in the UK and later for Celine Dion in the US. Applegate's work has been a staple in the Eurovision Song Contest, contributing to entries like "Party for Everybody" and "Say Na Na Na." Her collaborations span a wide range of artists, including Shirley Bassey, Andrea Bocelli, and Air Supply. In recent years, she began writing German lyrics, achieving chart success with Wolfgang Petry.