Photo: Justin Bieber (Instagram) Questions are being raised about Justin Bieber ’s past connection to rapper Sean "Diddy" Combs and whether the young singer’s parents did enough to protect him. A former Playboy model, Precious Muir, has recently spoken out, saying that Bieber’s parents should have been more involved during his early career and kept a closer watch on him. Muir, who attended one of Diddy’s parties, said she noticed underage guests there. She thinks that Bieber’s parents, Jeremy Bieber and Pattie Mallette, made a mistake by allowing their son to be around Diddy without their supervision. "There is no way their parents should have left their children with this man by themselves," she said. "Parents should be there to protect their child." In recent years, Diddy has faced several accusations about his behavior and the people he allowed at his parties. Although Bieber has not accused Diddy of any wrongdoing, videos of a young Bieber with the o...