At Rock in Rio
on Saturday, Sept. 28, Weezer
ended their set by playing a cover of Nirvana's "Lithium" as a teaser for fans who would be watching headlining band Foo Fighters
play. According to Loudwire
, later in the Foo Fighter's set, Dave Grohl
mentioned the cover by saying, "I was backstage and I heard Weezer play the ‘Lithium’ song," Grohl told the crowd, continuing, "I gotta be honest, I cried a little bit. I did! I miss playing that song. I miss it, so I’m happy to hear Weezer play it again. So this one goes out to the sweet Weezer."