Justin Bieber opens up on depths of his past drug use and says his guards used to check his pulse

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Justin Bieber opened up about his past drug use, saying things got so bad, his guards used to check his pulse to make sure he was alive.The Canadian pop star, 27, speaking with GQ, said that he was immersed in substance abuse at a time he was not prepared for how to deal with the massive fame and success he had as a performer.'It was like I had all this success and it was still like: "I'm still sad, and I'm still in pain,"' the Peaches singer said. 'There was a sense of still yearning for more.

It was like I had all this success and it was still like: "I'm still sad, and I'm still in pain. And I still have these unresolved issues." The latest:Justin Bieber, 27, opened up about his past drug use, saying things got so bad his guards used to.