Green Day’s well-known vocalist and frontman, Billie Joe Armstrong posted a new Instagram story on his official account and referred to Post Malone who covered Green Day’s well-known song, “Basket Case.”

Here is what Billie Joe wrote:

“One of the first songs Mike (Dirnt) and I learned how to play together was a Post Malone song.”

You can see the Instagram story below.

You can watch Post Malone’s Basket Case cover below.