Adam Lambert

Not only has Lambert admitted to smoking weed, but he told "Rolling Stone", he tried "certain funguses," leading to a "psychedelic experience"!
(Photo by Frederick M. Brown/Getty Images)

Adrianne Curry

One day she wrote on her Twitter page: "Jumping into shower. Going to spend my afternoon playing World of Warcraft butt naked & stoned. Perfect Sunday!" (Photo by Kevin Winter/Getty Images)

Brad Pitt

Pitt "liked to smoke a bit of grass" during his early days in Hollywood.
(Photo by Stephen Lovekin/Getty Images)

Cory Monteith

Monteith smoked weed but also admitted to struggling with drug addiction. (Photo by Alberto E. Rodriguez/Getty Images)

David Arquette

Arquette has talked candidly about his past drug addictions: "I seriously started drinking probably when I was about 12. I stole pot from my father when I was 8 years old," he told Oprah Winfrey. (Photo by Mike Windle/Getty Images for Art of Elysium)

James Franco

Franco said he does not smoke weed now, but he used to: "I used to smoke weed, but I haven't done it in a long time. Everybody, even now, thinks, 'That guy is stoned.' It's just the way I talk, because I don't smoke weed.," he told USA Today. (Photo by Jason Kempin/Getty Images)

Justin Timberlake

Justin Timberlake admitted to smoking weed in an interview with "Playboy": "Sometimes I have a brain that needs to be turned off," he explained. (Photo by Dominik Bindl/Getty Images)

Kristin Dunst

"I do like weed," Dunst told The Daily Mail. "I have a different outlook on marijuana than America does." (Photo by Mike Coppola/Getty Images)

Morgan Freeman

Although Frreeman says that he has given up hard drugs these days, he told The Guardian that he'll "never give up the ganja," calling it "God's own weed."
(Photo: MAX NASH/AFP/GettyImages)

Natalie Portman

Portman told "EW" she "smoked weed in college."(Photo by Pascal Le Segretain/Getty Images)

Rihanna

Come on... are we surprised? (Photo by Kevork Djansezian/Getty Images)

Snoop Dogg (Or Snoop Lion?)

Really? Do you need me to write something here? (Photo by Frederick M. Brown/Getty Images)

Whoopi Goldberg

Not only has Goldberg admitted to smoking weed, but she said she was high when she accepted her Oscar for her role in "Ghost"! (Photo by Brad Barket/Getty Images)

Lady GaGa

"I smoke a lot of pot when I write music," she said during an interview on 60 Minutes. Shocked? (Photo by Rob Kim/Getty Images)