Darren Warren, a former patient of St. Jude Children’s Research Hospital, has been chosen to sing the National Anthem at the St. Louis Supercross. The event, which benefits the hospital, will also feature an event that also benefited St. Judges. Warren, now a rising country star, underwent treatment from 1999 through 2001 and has since written a number of songs, including "Cowboy Up, Party Down" and "She Don't." His experiences with cancer changed his life and influenced his career and outlook on life.