Great thread!
I have read oodles of celeb/singers/musos/actors over the years. This is what I recall and all of it is IMHO, which shouldn't be taken as a seal of quality. I am including both biographies and autobiographies.
Great:
Paula, Bob and Michael - like a PP said, bloody excellent and made me think
Red Carpets and Banana Skins - Rupert Everett - candid and well-written
Victoria Wood by Jasper Rees - I have it on Audible. Absolutely brilliant.
Lily Allen - cannot recall the title, but beautifully raw.
Good:
Re:Minder - Dennis Waterman - especially all of the comments/inclusions gleaned from his friends/family/colleagues!?
Spinning Plates - Sophie Ellis Bextor - well written and honest
Honest - Sarah Harding - so sad
Rags to Ritchie - Shane Ritchie - very cringey, but a good showbiz tale.
Frank Skinner by Frank Skinner - quite out of date now, but well-written as Frank has an MA in English Lit. Some of the sexual aspects aren't an easy read post #MeToo and Brand.
Bad:
Kelly Brook - boring, dull and yawnsome. A beautiful woman with the brains and talent of a mayfly.
Honest - Mel B - couldn't finish.
.......