Oliver Hudson is his sister Kate Hudson's No. 1 cheerleader - unless she wears a revealing outfit. "I'll start by saying that I cry everyday with pride for my sis after seeing her performance in Song Sung Blue. It moved me beyond expectation," Oliver, 49, wrote via Instagram on Saturday, December 13, sharing a photo of Kate, 46, at the film's premiere held earlier this week. "[I am] tearing up as I write this.