Justin Bieber insists he is in full control of his actions.But the 'Beauty and a Beat' singer - who is being investigated for battery following a heated verbal argument outside his home in Calabasas, California last week and has attracted a lot of controversy for bad behaviour in recent months - admits he finds it harder to trust people these days and only has four real friends.The 19-year-old Canadian singer told the May issue of Teen Vogue magazine: "I get good vibes from people all the time, and I probably could get along with them and be their friend, but now I just don't trust anybody. Literally, my phone never rings. I only have, like, four people that I keep in contact with."I don't need a bunch of friends to make me happy. I just need the people close to me that I love, that's all."Justin has attracted a lot of criticism recently for a string of incidents including smuggling a monkey into Germany, showing up to his concert two hours late in London and most recently for getting barred from an Austrian nightclub after his security team allegedly broke a fan's camera.But the popstar refuses to let speculation about his behaviour affect him and compared himself to Jay-Z.He said: "I know who I am and I'm very much in control. I don't need to address every speculation. Remember when Cam'ron dissed Jay-Z? Jay-Z didn't even respond. Why didn't he respond? Because he's Jay-Z."Justin also believes he still has the support of his fans.He said: "My Twitter is really nice. I have so many fans that I rarely ever see a nasty tweet. ...I see so much stuff on the Internet, sometimes I just want to go to Twitter and just go after people. But then I think twice: If someone if dissing me, I'm going to make this person way more famous by tweeting them."