Peter Mensch, a very respected music manager, has an opinion about Justin Bieber’s career and it’s not a positive one. Mensch is the current manager of the very successful rock bands, Red Hot Chili Peppers and Metallica, said that Bieber’s manager is “scared sh*tless.” Justin has had a pretty rocky year this year leaving many to believe that he’s spiraling out of control and won’t have his fame much longer. Find out what else Mensch said below.