One thing that's important to remember about Paramore is that they always keep their promises, and they certainly came through in this instance!
"Stranger Things" actor Gaten Matarazzo is no stranger to the stage himself, in fact his band Work In Progress took on Paramore's hit "Misery Business" in Jersey not too long.
That performance led to a tweet from singer Hayley Williams promising Gaten a place on their stage to perform with them whenever they'd like!
That promise came true last night in New York City when they band brought Gaten and his sister to the stage to do the song together! Of course the actor had a huge smile on his face the whole time...and can you blame him?
Check out the original tweet, and video of the performance below: