Katharine McPhee, 37, poses in swimsuit from 40-year-old step-daughter Sara Foster's collection

Who is Dragons’ Den star Sara Davies? What’s her business and where is she from?

Katharine McPhee Proudly Poses in a Bikini Weeks After Welcoming Baby: "Loving My Curves"

Katharine McPhee Embraces Her Curves in a Bikini Five Weeks After Giving Birth