Dave Grohl Says Adele and Taylor Swift Won't Appear on Foo Fighters' New Album, Despite Rumors

Foo Fighters' upcoming album Concrete and Gold will have "the biggest pop star in the world" feature on it, according to Dave Grohl. The frontman teased the collaboration last month in a BBC Radio 1 interview, and he talked about it a little more in a recent Rolling Stone interview. Who that singer is remains under wraps. "We decided we…