Justin Bieber is trying not to crack under the pressure of being a first-time dad. Sources close to the Baby singer tell RadarOnline.com they fear he may be on the brink of a breakdown as he tries to juggle fame and fatherhood. One insider said: “Justin already has a hard time coping with life in the spotlight, so the worry is the stress of having a child to take care of and protect will be more than he can handle.” The 30-year-old pop star and his 27-year-old wife, model Hailey Bieber, celebrated the birth of their son, Jack Blues Bieber, on August 22. Justin honored his child’s entrance into…
