The one-named singer of the song 'You Gotta Be' is Des'ree. Des'ree is a British singer-songwriter who has been active since the early 1990s. She is best known for her hit single 'You Gotta Be', which was released in 1994 and reached the top 10 in the UK Singles Chart. Des'ree has released six studio albums and has collaborated with many other artists, including Queen, Elton John, and Wyclef Jean.