As we've reported -- a lot -- Metallica have been celebrating their 30th anniversary for the past week with a series of shows at the Fillmore in San Francisco.
The shows have featured a rotating cast of special guests that makes it seem like virtually everyone wanted to wish Metallica a happy 30th birthday.
Among those who sent along their birthday wishes were Green Day, who posted a video of the band covering the Misfits classic "Hybrid Moments" in honor of Metallica. You can check out the video below. Billie Joe doesn't do a half bad Danzig, does he?
Green Day are reportedly working on the follow-up to 2009's 21st Century Breakdown.
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Josh Hart is a former web producer and staff writer for Guitar World and Guitar Aficionado magazines (2010–2012). He has since pursued writing fiction under various pseudonyms while exploring the technical underpinnings of journalism, now serving as a senior software engineer for The Seattle Times.