'Janis: Little Girl Blue': Inside the New Joplin Doc

This fall marks the 45th anniversary of Janis Joplin’s death from an overdose in a Hollywood hotel room. Since then, she’s been the subject of books, reissues, a boxed set, an off-Broadway show, and a still-in-development biopic, possibly starring Amy Adams. Everyone from Kim Gordon to Pink has given Joplin…