Shawn Mendes reunited with his ex Hailey Bieber (née Baldwin) and her husband, Justin Bieber, sparking rumors that the singers have a new collaboration in the works.Mendes, 22, Hailey, 23, and Justin, 26, were spotted at the same recording studio in Beverly Hills on Wednesday, August 19. The “In My Blood” crooner arrived in a black SUV while wearing a blue graphic T-shirt, jeans and a protective face mask amid the COVID-19 pandemic.