The singer turned to a designer she's trusted time and time again to create a one-of-a-kind gown for her London wedding to David Foster And the bride wore … Zac Posen! Katharine McPhee turned to ...

At the crux of this question, is acclaimed fashion designer and former Project Runway host Zac Posen ... s seven movements, Posen designed a series of simple yet vibrant dresses and unitards ...