Soul star Mary J Blige is baffled by young stars releasing autobiographies, insisting she won't tell her life story until she's 80 years old.

The BE WITHOUT YOU hitmaker, 35, is clean and sober after battling drink and drug problems in the 1990s and suffering abuse as a child - but she wants to wait until she's lived more of her life before putting pen to paper.

She says, "(At 80) then you have to tell everything, and I'm not ready. I went through so much abuse as a kid that people don't even know about."