Oliver Hudson loves nothing more than being a dad, and was overcome with emotion as he thought about his kids earlier this week.MORE: Oliver Hudson announces exciting news - and Kate Hudson has unexpected reactionGoldie Hawn's son took to Instagram to share an adorable throwback photo of his three children, Bohdi, Wilder and Rio, lined up in car seats while sitting in the garden.In the caption, the Hollywood actor wrote: "This just popped up in my photos.. I'm crying and don’t know why.