The rock band recently went undercover with 'The Tonight Show' host
Green Day was "having a blast" going undercover in New York City.
The rockers were joined by Jimmy Fallon, sporting disguises as they headed into the Rockefeller Center underground where they surprised a bunch of commuters with a live performance.
Green Day and the late-night host, 49, sported wigs, facial hair and hats to conceal their identities to unsuspecting New Yorkers.
"Nobody knows that it's Green Day," the Fallon remarked in the video.
Green Day kicked off their set with the comedian taking the lead, performing a cover of Bad Company's "Feel Like Making Love," before the band removed their disguises and Green Day took over.
The four-time Grammy-winning outfit then launched into their 1994 classic "Basket Case" with Fallon on the tambourine.
During their busking set, Green Day also performed recent singles "Dilemma" and "Look Ma, No Brains!," as well as their 2004 single "American Idiot."
"It definitely deals with mental health and addiction," Armstrong said of the track. "When I say, 'I was sober, now I’m drunk again,' that could be looked at two different ways. It could be someone going, 'F---, yeah. I was sober, now I’m drunk again,' at a party, or it could be someone that’s fallen. That’s what it means to me, anyway."
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Over the years, the Green Day frontman has been candid about his issues. He initially opened up about his anxiety and panic attacks on "Basket Case," and the band announced he entered a treatment facility following an onstage rant in 2012.
Now, Armstrong is happy, healthy and sober.
"I don't drink. I didn't use any kind of program or anything like that," he said. "I ended up being around a bunch of really good friends that don't drink. There's a lot more sober people — I've noticed that, and maybe because I was the only one that was hammered before, that now I notice that people are more sober now, and it was just something that I was unaware of, because I was s---faced or something."
Saviors is out now.
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