American Idol 'American Idol' runner-up Katharine McPhee finally joins 'Idol' tour 07/31/2006 "American Idol" runner-up Katharine McPhee finally joined the Idol tour in Washington after missing nearly a month due to laryngitis. Read More RELATED NEWS 'American Idol' alum Mandisa's cause of death revealed'American Idol' alum Mandisa dead at age 47Katharine McPhee leaves David Foster tour after "horrible" family tragedy TAGS: American Idol Katharine McPhee The View