“I found myself doing things that I was so ashamed of," the singer said.The pop star reveals his past drug abuse problemsJustin Bieber has opened up about his troubled past in a candid new interview. The pop star was arrested for drunk driving and driving without a valid license in January 2014. He has also been accused of faking illness to skip a ‘Sorry’ songwriting dispute deposition, and allegedly headbutting a man after a pre-Grammys event. […]The post Justin Bieber opens up about his troubled past: “Security was coming in late at night to check my pulse” appeared first on NME.