'Janis: Little Girl Blue' reveals what drove - and haunted - Janis Joplin

It's hard to imagine in the age of Taylor, Miley and Rihanna, where airbrushed looks are paramount and rebellion is curated, that an artist like Janis Joplin was ever allowed to happen.

Imperfect and messy, she was a white girl who sang the blues, a wily independent figure who predated equal rights,...