Simplify the following text for a Grade 7 native English-speaking person.
Original: Ruben Studdard ( born September 12 , 1978 ) is an African-American singer who won season 2 of American Idol .
Simplified: Christopher Theodore Ruben Studdard ( born September 12 , 1978 ) , best known as Ruben Studdard , is an American R&B , pop , and gospel singer . He rose to fame as winner of the second season of American Idol .