David Foster & Katharine McPhee - Christmas Songs

David Foster, Katharine McPhee - Christmas Songs

Katharine McPhee, David Foster - Christmas Songs

Katharine McPhee Sings Her Heart Out on "Scorpion"

Katharine McPhee Spills on Singing on "Scorpion"

'Amped up': Katharine McPhee holds on to her life in Scorpion

They're Engaged! David Foster Proposes to Katharine McPhee During Romantic Italian Getaway

David Foster and Katharine McPhee talk Las Vegas shows, raising young son

David Foster slammed for calling wife Katharine McPhee ‘fat’ on ‘American Idol’