With frontman Billie Joe Armstrong still in rehab, Green Day looks like it’s still in the rough. The band has cancelled its upcoming appearance at New Orleans’ Voodoo Music and Arts Experience.

“His rehab is no joke,” said Warner Bros Records Chairman Rob Cavallo of Armstrong’s recent troubles. “He’s under medical supervision for a while to get him clean.” Cavallo could not verify if Armstrong would be out and ready to perform before or after the holidays.

For now, Metallica will take over Green Day’s slot at Voodoo. This will be Metallica’s first time playing the festival. “Our good friends and fellow Bay Area residents Green Day had to unfortunately cancel their plans to be there, so we are more than happy to fill in for them in our own unique way,” said Metallica drummer Lars Ulrich. Neil Young and Crazy Horse, Jack White, Skrillex, the Avett Brothers and Justice are some of the other acts that are set to play at Voodoo  from October 26^th through October 28^th.

As far as Green Day goes, the band’s fall tour is set to kick off on November 26^th in Seattle and wrap up in February. However, it’s still up in the air as to whether or not some of these dates will be cancelled. “Cancelling shows is something we rarely do,” said Green Day drummer Tré Cool of the Voodoo cancellation. “We never want to let our fans down, and we are grateful for all of you being understanding during this time.”