He had a very public meltdown last fall during a gig at the iHeartRadio Music Festival in Las Vegas, and Billie Joe Armstrong opened up about his substance abuse issues in the new issue of Rolling Stone.

The “Basket Case” rocker says he’s determined to stay clean and sober these days, given that he’s struggled for 20 years with addiction.

Bille Joe began, “I played onstage loaded a lot. I'd have anywhere from two to six beers and a couple of shots before I went onstage, then go and play the gig and drink for the rest of the evening on the bus.”

“Fall asleep, wake up the next day, feel like s***, do sound-check... it was over and over again. In that way, I was a functioning alcoholic. I've been trying to get sober since 1997, right around Nimrod. But I didn't want to be in any programs. Sometimes, being a drunk, you think you can take on the whole world by yourself. This was the last straw. I had no choices anymore,” he added.

As for his addiction to pills, Armstrong shared, “I started combining them to a point where I didn't know what I was taking during the day and what I was taking at night. It was just this routine. My backpack sounded like a giant baby rattle [from all of the vials inside].”