Watch: Kelly Clarkson performs “Piece by Piece” on ‘American Idol.’

Kelly Clarkson Performs on 'Idol' While 8 Months Pregnant (Video) Kelly got super emotional during the performance and teared up while singing. "I’m pregnant, it's nostalgic, I can't believe it's the last season," Kelly said. The show's first winner sang "Piece by Piece" and brought Keith Urban to tears. Do you like Kelly’s performance?  If