Wikipedia
Foozer was the title given to the Fall 2005 co-headlining concert tour of the Foo Fighters and Weezer. Various openers for the bands included Mae, Kaiser Chiefs and Hot Hot Heat. The Foozer tour was awarded "Most Creative Tour Package" at The 17th Annual Concert Industry Awards 1.
On the last stop of the tour in Oakland, California, the Foo Fighters played several pranks on Weezer during their set. During Rivers' solo acoustic performance of " Island in the Sun", a heavy-set exotic dancer emerged from the crowd behind him, and gyrated throughout the song. During Weezer's " Undone (The Sweater Song)", where Rivers usually asks a member of the audience to come play acoustic guitar on stage, Grohl instead appeared on stage and performed with Weezer with an acoustic guitar that he smashed at the end of the song.2 Also, during the set closer of "Buddy Holly", a half dozen men in security uniforms took the stage behind the band. They quickly started dancing and removing their clothes, revealing themselves to be male exotic dancers, each with a letter spelling out "Weezer" painted on their chest. During the Foo Fighters subsequent set, Dave Grohl took credit for the pranks, and expressed hope that Weezer would retaliate in kind.