Billie Joe Armstrong (@billiejoearmstrong on Instagram)

Late last year, Green Day surprised everyone with a punktastic Christmas tune. Sometimes when you get warm and fuzzy during the holidays, you gotta rock out too, right? A week after that, frontman Billie Joe Armstrong tweeted that he wanted to destroy the word "pop-punk" in 2016. Our hearts broke into a million tiny, mostly confused pieces. 

Whatever he meant with the less-than-140 character message, we now know he's in the studio, thanks to an Instagram post.

Does this mean a new Green Day record is underway? And if the guy hates pop-punk so much, are the days of palm-muted power chords behind him? Do we have to throw away our slip-on Vans sneakers?

Only time will tell. As you wait, click through our list of 20 essential Green Day hits.