In 2000, the band recruited Queen guitarist Brian May to add some guitar flourish to a cover of Pink Floyd's "Have a Cigar", a song which Foo Fighters previously recorded as a B-side. The friendship between the two bands resulted in Grohl and Taylor Hawkins being asked to induct Queen into the Rock and Roll Hall of Fame in 2001. Grohl and Hawkins joined May and Queen drummer Roger Taylor to perform "Tie Your Mother Down", with Grohl standing in on vocals for Freddie Mercury. May later contributed guitar work for the song "Tired of You" on the ensuing Foo Fighters album, as well as on an unreleased Foo Fighters song called "Knucklehead".