How much is celebrity really worth? In a growing trend, Hollywood’s biggest stars from Ashton Kutcher to Beyoncé have set out to turn their fame into bankable capital by tossing out traditional endorsement deals in favor of strategic partnerships that grant them a stake in today’s top companies. Ushered in by 50 Cent’s deal with Vitamin Water — in which the rapper took equity instead of cash, eventually walking away with a nine-figure haul — celebrities of all different colors, genders, and talents have learned to capitalize on the invaluable benefits of their platform and visibility.

The ever-evolving, mutually beneficial relationship between Hollywood and Silicon Valley has led to everything from laughable flops and billion-dollar profits to rock star CEOs and paparazzi-worthy boards of directors. Through extensive reporting and exclusive interviews with stars like Shaq, Nas, Sophia Bush, and Steve Aoki, Forbes senior editor Zack O’Malley Greenburg takes an up-close-and-personal look at the rise of celebrity investors and their impact on companies including AirBnB, Spotify, and Uber.