Frontman's Rehab Stint "Killing" Green Day

After a well-publicized meltdown onstage at an iHeartRadio music event last month, Green Day frontman Billie Joe Armstrong seems to be taking his recovery seriously. He has remained in rehab ever since he checked in shortly after the September incident, and the band has been vocal about their wholehearted support of their leading man—despite apparently feeling the sting of his absence. "Billie doesn't take things lightly and he wouldn't take rehab lightly, either," says bassist Mike Dirnt. But while the "basket case" recovers, the band has been forced to cancel their October 27 appearance at the Voodo Festival in New Orleans. The break in touring is "killing everyone," says Dirnt, since "Green Day has never been a band that sits still." Still, it's been something of a lesson for the bassist: "sometimes you have to step back and let life go on rather than try to control everything.” Despite the trouble Armstrong's breakdown has caused for his band, he won't be walking the lonely road of recovery alone. "I know that my friend's life is in danger and that's all I care about," says Dirnt. "We're brothers-in-arms waiting for Billie to return healthy, but we're not going to force anything."