Season 1 "American Idol" winner and breakout star Kelly Clarkson returned to the stage that made her famous Thursday night to mark the first live broadcast of "Idol's" final season.<br />Performing "Piece by Piece," a song about an absentee parent, the pregnant singer touched the crowd and judges with heartbreaking lyrics and an emotionally bare performance.<br />Toward the end of the song, Clarkson's voice broke with emotion, and she apologized as "Idol" judges Keith Urban, Jennifer Lopez and Harry Connick Jr. watch in awe.<br />The crowd loved her raw performance, chanting, "Kelly, Kelly, Kelly!"<br />Clarkson explained that she wrote the song when she was pregnant with her little girl, River Rose.
