Moments ago, Green Day took the stage in Milan, Italy at a Prima Donna show to play a surprise set of songs. Prima Donna updated their Instagram with the picture to the right and the following caption.
"True story: our boys Green Day came to our show in Milan and decided to play a few tunes. #ThisIsHappeningRightFuckingNow"
Apparently, Mike tipped us off earlier today in this post on his Instagram.
We'll update this post as we learn more about the show...
Update 1: We've added the show into our tour section. As we get the setlist and photos, they will be posted there.