Credit:GettyLocation:Washington, DCCaption:David Foster and Katharine McPhee’s friendship goes back over a decade … and includes Katharine’s blonde phaseCategory:David FosterStar:Katharine McPheencG1vNJzZmivp6x7tbTEoaalpKmsvLCwxqiqrKGgY7CwuY6gmKWklafGcLDAr6CdZZakwLWx0WaYp5xdoK61tMCroKedXaKwsbTEnmSbpJ%2BjsaZ7