Justin Bieber found mum's tell-all tough to read

Pattie Mallette, who was 19 when the Baby singer was born, has opened up about her troubled past - including details she had kept from Bieber - for Nowhere But Up: The Story of Justin Bieber's Mom.

And she admits there were chapters her son struggled with, stating, "I know reading the book was really hard for him. I know a few times he just had a really tough time getting through some of the chapters and I can't blame him."

The book details Mallette's past drug and alcohol addictions and her childhood sexual abuse.

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