Katharine McPhee and David Foster Open Up About Their Love: 'It Doesn't Make Sense to A Lot of People But It Does to Us'

From "American Idol" To Stardom: How Katharine McPhee Forged Her Own Success Story.

Katharine McPhee Was ‘Concerned’ What People Thought of David Foster Age Gap

Katharine McPhee Returns to ‘American Idol’ for Stunning ‘Over the Rainbow’ Performance! (Video)

Katharine McPhee brilliantly sings Somewhere Over the Rainbow