Post Malone Covers Green Day, and Billie Joe Armstrong Approves

I've long been a fan of Green Day, I'm a huge fan of Post Malone, and so it was a nice moment to have both of those musical monsters collide.  It happened when Post did an acoustic cover of "Basket Case" at a show last week in Maryland.  A video of the performance went online. Billie Joe Armstrong saw it, and like it so much that he re-tweeted it and said that it was pretty cool!