American Idol Katharine McPhee marries David Foster in London 07/01/2019 Katharine McPhee has married music mogul David Foster in London. Read More RELATED NEWS Katharine McPhee leaves David Foster tour after "horrible" family tragedy'American Idol' alum Kellie Pickler's husband Kyle Jacobs dead from apparent suicideKatharine McPhee gives birth to first child with David Foster TAGS: American Idol Katharine McPhee David Foster