Jared Leto -- actor/musician
Investments: Frame.io, Nom, Headspace, Blue Bottle Coffee, Zenefits, PlateJoy, Life On Air Inc., Reserve, Reddit, Superpedestrian, Radius, Robinhood, Surf Air, Gobbler
As if moonlighting as a rockstar weren't enough to keep this Oscar winner busy, he's amassed an impressive investment portfolio with stakes in 14 different companies -- including Surf Air, a members-only, on-demand private jet service that only flies around California.
Jessica Alba -- actress/entrepreneur
Investments: Headspace, Managed by Q, Honor
You may have heard about Alba's own billion-dollar venture, The Honest Company, which she co-founded in 2011, but she's also a financial backer of a few others including Managed By Q, which is basically a TaskRabbit for office managers. Unclear whether James Bond is involved.
Dwyane Wade -- athlete
The Chicago Bulls star has stake in the novelty sock brand Stance. He's probably just in it for the free socks.
Lady Gaga -- musician
Gaga's big investment was in a venture that would help brands build standalone social networks, but much like Gaga herself, it was reinvented into something slightly different: a way for anyone to create custom-themed online communities.
Justin Bieber -- musician
Investments: Shots Studios, Stamped
If Bieber's star ever burns out, he might be able to live comfortably off the dividends from a pair of investments, including Stamped, a "recommendation" app that was acquired by Yahoo.
Tony Hawk -- athlete
Investments: Blue Bottle Coffee
Mr. Pro Skater must really, really love his artisanal beans.
Arnold Schwarzenegger -- athlete/actor/politician
Arnold had the foresight to throw his financial support behind the fledgling search engine way back in '99.