American Idol Katharine McPhee reportedly dating one of her 'Scorpion' co-stars 09/26/2014 Katharine McPhee is reportedly dating someone new -- and another person she works with. 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 Mary McCormack Michael Morris Elyes Gabel Scorpion
