Ruben Studdard is an American R&B, pop, and gospel singer who gained fame as the winner of the second season of "American Idol" in 2003. His rich, soulful vocals, often compared to those of Luther Vandross, have become his signature sound, earning him the nickname "Velvet Teddy Bear." Studdard's most notable works include his platinum-selling debut album "Soulful" and the Grammy-nominated single "Superstar." Throughout his career, he has made significant contributions to both pop and gospel music genres.