Maybe it's just my own observation, but most people I know have hit rock bottom before they come to accept Christ or, if they were raised in church by myself, they hit rock bottom before taking Christ seriously or moving to the next level in their faith.
Some of the people I'm closest with have hit extreme rock bottoms in life, as much as any celebrity.
I guess I feel sorry for famous people because bigger opportunities can mean a person has chances to make bigger mistakes, and they do so very publicly. After all, although I talk about my life openly, when I was going through my own rock bottoms, I wouldn't have wanted them splashed all over every magazine and TV broadcast...
I wish Mr. Bieber all the best! And, I've always been a bit of a Donny Osmond fan after seeing him in "Joseph and the Amazing Technicolor Dreamcoat"... along with the fact that I read an interview with him in which he stated that he was a virgin when he got married. Extremely rare... celebrity or not... and most admirable.