Thankful is the debut studio album by American singer Kelly Clarkson, released in the United States by RCA Records on April 15, 2003, followed by a worldwide release in July 2003. After winning the first season of reality singing contest American Idol in September 2002, Clarkson began recording her debut, collaborating with a variety of writers and producers. Originally slated for November 2002, its release was delayed due to her busy schedule and the search for material that fit her style. By the time it arrived, over six months had passed since her coronation song "A Moment Like This" reached number one.