American Idol Katharine McPhee shows off her engagement ring on Instagram 07/23/2018 Katharine McPhee is giving fans a first glimpse of her engagement ring. 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 David Foster Smash Scorpion
