Kym Mazelle (born Kimberley Grigsby in 1960, in Gary, Indiana, U.S.) is an American soul music singer. Early in her career, in the late 1980s and early 1990s, she enjoyed major success in the European house music scene, and performed as a member of Soul II Soul. However she is probably best known as the singer of the cover version of Candi Staton's "Young Hearts Run Free", in the 1996 Baz Luhrmann film, William Shakespeare's Romeo + Juliet. In 2005, she participated in the British version of the Reality TV show, Celebrity Fit Club. In which she lost 1 stone, 10 pounds during the course of the programme, as well as tearing her calf muscle whilst performing a sudden movement during an exercise routine. After it healed she ripped it again, whilst trying to get out of the way of a moving car.