The Baby hitmaker's ill-advised antics on tour and at home in California, which have included brushes with the law and headline-grabbing incidents, have prompted big names to offer up their help and advice.
Bieber's bad behaviour has included nightclub altercations, arguments with his neighbours, disappointing fans by rushing through meet and greet sessions and public urinating claims.
The incidents have prompted a slew of concerned celebrities to reach out to Braun to see if there is anything they can do to help the youngster avoid destroying his career, according to The Hollywood Reporter.
In a candid new interview with Braun and Bieber, the singer's manager reveals he has fielded calls and emails from Winfrey, singer Adam Levine, rapper Drake and Mark Wahlberg, while Hanks' wife Rita Wilson offered up her husband's counselling skills to help the 19 year old avoid the pitfalls of fame.
And Braun claims Eminem's manager, Paul Rosenberg, told him, "If you ever want Eminem to talk to him (Bieber), he would do it in a second. He cares about that kid."
Braun has yet to take up the stars' offers to advise Bieber during times of trouble as there is already one big name who is trying to keep the teen in check - Will Smith.
Braun claims Smith, whose son Jaden is good friends with the singer, once paid Bieber a much-needed visit and pulled him out of bed for a three-hour chat.
The manager recalls, "He (Bieber) said, 'Man, that makes me feel so loved. I woke up, and there's Will Smith, one of, if not the, biggest movie stars on the planet. He took time out of his day for me.'"
Smith has continued to make himself available to Bieber for weekly phone conferences, but the Independence Day actor has warned Braun the youngster will have to live and learn from his own mistakes: "He's telling me: 'Justin's got to go through it. You can't stop him from going through it. That's youth in itself. He's a young man who's growing up, and that's what makes him interesting and relatable. Otherwise, he'd be some kind of weird robot.'"
During the interview, Bieber expressed his carefree attitude towards his critics, saying, "I don't give a f**k... I don't give a f**k what they say... I know who I am and what I'm doing in my life and what I've accomplished and continue to accomplish as a performer, as a writer, as an artist, as a person, as a human being. I'm happy with the man I'm becoming."