Some days lately a dance challenge is about the best you can hope for. It's a great way to get the family together, and it's just good, clean fun. Justin Bieber got into the act this weekend, reposting a TikTok video from his step sister Allie Rebelo, in which he, wife Hailey Baldwin, Allie, Jazmyn Bieber and Justin's youngest sister, Bay, 1, take a shot at Drake's "Toosie Slide."