Katharine McPhee and David Foster attend the David Foster Foundation Gala: A Night On Broadway

Katharine McPhee & David Foster Couple Up at George Lopez's Celeb Golf Tournament

David Foster, 72, spends quality time with his wife Katharine McPhee, 38, while attending a party

Katharine McPhee Hilariously Uses Sheet Mask in a Restaurant to Promote Her Friend's New Product!