David Foster & Katharine McPhee's Son Rennie Is 'Finding His Groove' In Cute Drumming Video

David Foster is one proud papa of his rockin' and rollin' kiddo. The 73-year-old musician shared a video to his Instagram on Sunday of his almost two-year-old son, Rennie, impressively playing the drums. "Finding his groove. 23 months," the music producer captioned the post. This isn't the first time David has showed off he and his wife, Katharine McPhee's son's skills. Earlier this month, the music producer shared another cool video of Rennie rocking out, with a fan watching in the distance.