Haley Reinhart and Her FatherHaley Reinhart certainly had a memorable opening number for this semi-final performance episode of 'American Idol'.

She became the first contestant to perform during the show with a family member on stage when her father joined her on Led Zeppelin's 'What Is and What Should Never Be.'

He proved a consummate guitarist and a professional all around. Poor Haley, either flummoxed by her father's presence, or just unlucky in the moment, took a tumble at one point when trying to climb the stairs in front of the judges, but recovered quickly and finished strong.