Metallica and Green Day might share a Californian heritage, but that aside, musical similarities between the two groups often seem few and far between. So it comes as some surprise then, to hear Metallica's rendition of Green Day's 2004 signature single American Idiot. Metallica, who had replaced Green Day at the Voodoo Music Experience in New Orleans, made several references to the pop-punk act during their performance, even dedicating the track Battery to Green Day front man Billie Joe Armstrong. Towards the end of their set, the band played the first minute or so of American Idiot, before stopping because they couldn't remember the rest of the song.
Metallica front man James Hetfield prefaced the performance with the following: "You're hoping Green Day are going to show up, right? So am I. They're getting help. They're getting it sorted out. The world needs them."
Metallica's tribute comes as Green Day cancel or postpone all of their scheduled tour dates up until February 2013 because of Billie Joe Armstrong's continuing rehab. It had previously been speculated that the singer could still be receiving treatment into next year. Full details of the dates affected can be found here.
In a statement regarding the cancelations, bassist Mike Dirnt had the following to say: "Obviously the timing for this isn't ideal, but Billie Joe's well-being is our main concern... We are happy to say that Billie Joe is doing well, and we want to thank you all for the outpouring of support and well wishes that we have received, and we can't wait to see you all again soon."
The band has also pushed the release of their latest album, Tre! from January 2013 to December 12th, 2012.
Metallica haven't been the first to pay tribute to Armstrong after the singer's onstage meltdown back in September. Alanis Morisette dedicated a version of Basket Case to Billie Joe when she appeared on Jimmy Kimmel last month.