Sly Stone

Stevie Wonder, Flea, Beck and Questlove were among the performers.

He'd been battling COPD and other underlying health issues for some time.

The band's former drummer, Alan Gratzer, shares the story with UCR.

"This is a movie about Sly Stone," he tells UCR, "but it's also about the burden that comes with success for Black artists in America."

Producers of 'Sly Lives!' say their film is “an empathetic human story about the cost of genius.”

There was nothing like this groundbreaking, genre-jumping group – not then, and not now.