Katharine McPhee Shares 1st Photo of Son Rennie’s Face While Raving Over Husband David Foster

Katharine McPhee just shared the first snap of her of son Rennie’s face – and he’s truly too cute for words! The “American Idol” alum took to Instagram to pay tribute to her husband David Foster on Father’s Day by sharing a handful of photos of the 72-year-old’s six children, including a never-before-seen snapshot of the couple’s 16-month-old son.