"We have a bunch of guests that we haven't told anybody about", Dave explains.
"So I think maybe Greg is the guy that we ask to be our producer because he's never made a heavy rock record before and we've never worked with a pop producer. We're not telling anyone who it is".
This is per a recent Guardian interview, in which Grohl-who's finally making up the festival set with the rest of the Foo Fighters this Saturday-reveals that, shortly after breaking his leg, his wife came into his hotel room with news that he'd received "the biggest muffin basket I've seen in my entire life!" To make a very big rock record but with [producer] Greg Kurstin's sense of melody and arrangement.
"We're so used to recording in our own place and yet this was a big famous Hollywood studio where other musicians would book in for a couple of weeks". Nobody wants to say, 'This is the best album we've ever made, ' but when you hear it, you'll be surprised.
"So every day, we would sneak over to each other's studios and steal donuts and coffee".
Cal Jam 17 will be the biggest one-day USA headlining show for the Foo Fighters and will serve as the first chance for fans to experience "Concrete and Gold" in its entirety. Many fans believe Adele may be the secret weapon, given her producer Greg Kurstin also produced Concrete and Gold. "The first song is called "T-Shirt"; you gotta be careful, when it kicks in - just don't be driving when you hear it for the first time".
So, Foo Fighters have just announced that their brand new album 'Concrete and Gold' will be out in September (hurrah!) and according to Dave Grohl it'll be the "biggest sounding" Foos record to date.