Glenn Alan Medeiros (born June 24, 1970) is an American singer and songwriter of Portuguese descent who achieved chart success in the late 1980s and early 1990s. He is best known on the national and international music scene for his 1987 global smash, "Nothing's Gonna Change My Love For You", and "She Ain't Worth It", a US chart-topper in 1990, and has remained regularly involved in the musical industry in his home State of Hawaii (to include several headliner and related musical variety shows in Waikiki) long after achieving global success decades ago. 　　After his musical career peaked, he taught and was vice-principal at the Maryknoll School, a parochial school in his native Honolulu, Hawaii, and as an Professor at Chaminade University, a well-established private Marianist University which shares grounds with Saint Louis School. On July 1, 2015, Dr. Medeiros became the Head of School/Principal of Saint Louis School in Honolulu and in 2017 its President/CEO. 　　Medeiros began his musical career at the age of 10 when he helped his father entertain guests on his tour bus on the island of Kauai. In 1986, at the age of 16, Medeiros won a local radio talent contest in Hawaii when he performed a cover version of George Benson's "Nothing's Gonna Change My Love for You" which was subsequently produced into an album by a small local independent label. A visiting radio executive, Guy Zapoleon, from KZZP in Phoenix, Arizona heard the song and took the record back to Phoenix, where, through word of mouth, it became a national hit. Later, a worldwide hit, it reached #12 on the Billboard Hot 100 and spent four weeks at number one on the UK Singles Chart in July 1988. It reached #3 on Billboard's Adult Contemporary chart. 　　In 1988, he recorded the single "Un Roman d'amitié" (Friend You Give Me a Reason), a duet in French with Elsa Lunghini that reached #1 in France for three weeks. He also achieved a 1990 United States #1 hit duet with Bobby Brown titled "She Ain't Worth It". The same track peaked at #12 in the UK Singles Chart. He had another hit duet with Ray Parker, Jr. titled "All I'm Missing Is You" which peaked at #32 in the US. In 1989, Medeiros recorded "Under Any Moon" with The Jets, which was included on the soundtrack of The Karate Kid Part III in which he made an appearance in the movie singing. In 1992 Medeiros recorded a duet with Thomas Anders (of Modern Talking fame) titled "Standing Alone" and shot a video. 　　Medeiros wrote "Break These Walls" for the New Zealand singer, Sam Verlinden. He also wrote the song "Follow the Sun" for Regine Velasquez which was later recorded by the group Forte. In addition, Medeiros wrote the song entitled "These Tears I Cry" for Martin Nievera. Medeiros has written nearly two hundred songs, many of which have been recorded by various artists throughout the world. 　　Medeiros is the host and performer at the Hale Koa Hotel's luau in Waikiki, and was the Vice Principal of Maryknoll Grade School and then its high school.[1] He has taught grades K, 2, 3, 4, 5, 8, and high school at various schools throughout Oahu starting in both public and private schools including Mililani Middle School, St. Joseph School in Waipahu, Island Pacific Academy in Kapolei, and Maryknoll High School.[citation needed] Medeiros also headlined in Waikiki for many years with Frank Delima, one of Hawaii's most famous and seasoned comedians.In 2014, Glenn received a doctorate degree in Educational Leadership from the University of Southern California. 　　On July 1, 2015, Dr. Medeiros was appointed Head of School/Principal of St. Louis School, an all boys Catholic (Marianist Order) school (K-12) in Honolulu Oahu, where he is now its President/CEO since 2017.