I know this is old, but I was rewatching the Rig Rundown that was posted a year ago and noticed that after 5:00 when he's explaining Billie's acoustic guitars, he mentions that the acoustic one we've been seeing him play for the last few years is actually "The Everly Brothers guitar" and that it was designed by the Everly's father! At the time this obviously meant very little to most of us, but looking back it's really amazing and makes everything come full circle. (To be clear, it's not that it belonged to the Everlys, just that it was the same model)
Rig Rundown - Green Day's Billie Joe Armstrong, Mike Dirnt & Jason White
It also means that the guitar that Billie gave to the Everly family at the Grammys, in a weird way, always belonged to them. (At least by design).