Adele and Taylor Swift appearing on Foo Fighters’ new albumImage Source: louderthanwar.com

Foo Fighters frontman Dave Grohl recently announced the band will release a new album, called Concrete and Gold, and it will feature the “biggest pop star in the world”.

Fans speculated who the “biggest pop star” could be. In a new interview with Rolling Stone, Grohl has ruled out two of the most popular theories.

Neither Adele nor Taylor Swift sang on the record,” he said while refusing to confirm exactly who it is.

Grohl did reveal that he socialized with a lot of artists who were recording at Los Angeles, including Lady Gaga, Justin Timberlake and Shania Twain. He asked some of those artists present to sing on the record, but, again, would not say who they were or who accepted.

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