Kelly Clarkson Moves Keith Urban To Tears In Emotional ‘American Idol’ Performance [VIDEO]

Kelly Clarkson was the very first winner of American Idol, so it's only fitting she make an appearance on the show's final season. Kelly was a guest judge on Idol's first live show of the season last night. She provided insight, and then at the end of the episode, she proved why she is one of Idol's best ever.

Clarkson performed a song called 'Piece by Piece'. The song's emotional content took a toll on the singer as she broke down multiple times during the performance. The judges were also moved, as Keith Urban completely lost it. Clarkson apologized for the tears, saying that she wrote the song with her young daughter in mind. Clarkson is currently pregnant with child number two, a son. Check out Kelly's amazing performance and Keith's genuine reaction below.