Katharine McPhee, 37, and David Foster, 71, step out for the FIRST TIME with son Rennie

Katharine McPhee drapes svelte post-baby body in sleek double-denim look out in LA

Katharine McPhee on Why She Doesn't Feel 'Crazy Pressure' to Get Back Her Post-Pregnancy Body

New mum Katharine McPhee says she is 'really happy' with her post-partum figure