ChoiSiWon_Jackie_Chan_AndyLau03 Choi Si Won posted this sweet photo on his Weibo account of himself with Andy Lau...and Jackie Chan photobombing them adorably in the background! On the caption, he wrote that he was posing with two of his heroes. It was Siwon's birthday on the 7th this month, and Andy Lau sent him a signed copy of his CD. Here are some more of Siwon's birthday photos: ChoiSiWon_Jackie_Chan_AndyLau Siwon with fans in Hong Kong! ChoiSiWon_Jackie_Chan_AndyLau02 Fans in Beijing wish Siwon a happy birthday! (source: www.weibo.com)