Red Velvet's Bad Boy is a big hit right now, as it conquered the charts and made it to 87th spot in weekly Canadian Hot 100. It looks like it's their biggest international hit with an official hit single in Canada, a No. 2 peak on the K-Pop Hot 100 chart, as well as the group's biggest U.S. sales week for a song. Let's see how well they will do. They might really come on top with this huge success!