March 16 (UPI) -- Justin Bieber 's dad, Jeremy, shared a rare photo of the pop star with all four of his younger siblings this weekend. View this post on Instagram A post shared by Jeremy Bieber (@jeremybieber) Advertisement Advertisement The picture was captioned , "My crew," and featured Justin sitting on a couch with his smiling brothers and sisters : Bay, 6, Jaxon, 15, Jazmyn, 16 and Allie, 17. Bieber turned 31 on March 1. He and his wife, model Hailey Bieber, welcomed their first child ,