Actor Tommy Chong attends FOX's "The Simpsons" 500th Episode Celebration at the Hollywood Roosevelt Hotel on Feb. 13, 2012 in Hollywood

*Tommy Chong – of the weed smoking comedy duo “Cheech & Chong” – says Whitney Houston would still be alive today if she had used a certain kind of natural plant.

“Had she just stuck to pot, she’d be alive today,” the actor-comedian told Access Hollywood Tuesday night at “The Simpsons” 500th episode celebration. “It’s when you get into that other stuff… The trouble with that other stuff is that you forget you’re high. You think you’re taking a bath and you’re not. You’re under the water. It’s a sad, sad thing.”

Houston’s cause of death is still unknown, but authorities confirmed on Monday that the late singer was submerged in a bathtub when she was first discovered on Saturday afternoon at the Beverly Hilton Hotel. L.A. County Assistant Chief Coroner Ed Winter told reporters that the Los Angeles County Coroner’s Office was doing routine toxicology tests, the results of which will influence the determination of Houston’s exact cause of death.

In September 2009, Houston spoke out about her past drug use in an interview with Oprah Winfrey.

“We were lacing our marijuana with base… you put in your marijuana, you lace it, your roll it up and you smoke it,” she said at the time.

“Your drug of choice was weed combined with cocaine?” Oprah asked.

“Cocaine, rock cocaine. Yes,” the singer said, nodding her head.

According to Chong, Houston’s death was a farewell.

“It’s a sad, sad thing. In a way, though, it was like she was saying goodbye,” he told Access. “Like she was passing the torch onto Adele. It was a tough one to let go. It was like she came by and said, ‘OK, I’m out of here.’ It’s a sad, sad thing.”