Justin Bieber and Hailey Bieber’s son Jack Blues Bieber, 13 months, rang in the fall by wearing an adorable sweater featuring a photo from his dad’s 2010 album My World 2.0. Jack Blues Bieber is the ultimate Belieber. The 13-month-old son of Justin Bieber and Hailey Bieber proved he’s his dad’s biggest fan as he…