Ronan Keating's fans did a double take when the Irish pop star took a sweet snap of his kids including lookalike son Jack.The Boyzone legend, 44, proudly took the photo of his family as they attended the Cancer Research UK's Emeralds & Ivy Ball on Saturday night.The charity ball helped raise over £890,000 for Cancer Research UK and Ronan praised the effort from his kids. Captioning his Instagram post, the chuffed star wrote: "This is my world right here.