Kim Bum's cute smile Kim Bum (Boys Over Flowers) has a murderous smile that melts the hearts of his many fans. He recently posed at a signing event in Seocho, Seoul for Ringpang Donuts. He the going to be the latest spoke model for Ringpang Donuts. Yeah, it's a cute smile, but out of all the F4 members, he would be my last favorite. Lee Min Ho has to take the top spot, followed by Kim Hyun Joong taking second place and Kim Joon taking the third spot. Are you celebrating National Donut Day? Does his smile make you melt? What are you F4 rankings? I would love to know. Watch Kim Bum on DramaFever! Source: star.mk.co.kr