Kings Of Leon joined on stage by Pearl Jam's Eddie Vedder - watch
The singer performed 'The Bucket' with the band in San Francisco
The singer, whose band were headlining the Oracle Appreciation Event at Treasure Island, jumped on stage to sing Kings Of Leon's 2004 hit 'The Bucket' with the band - watch it above.
Shortly after the gig, bassist Jared Followill, who got married to his model girlfriend last weekend, tweeted:
Great show in San Fran with Pearl Jam. Eddie came up and sang The Bucket with us. Always an honor to share the stage with them. #Heroes— Jared Followill (@youngfollowill) October 4, 2012
In August, the bassist revealed the band are about to start work on the follow-up to their 2010 album 'Come Around Sundown', saying the four-piece had already met with producers with regards to their sixth studio album.
He said: "We've been meeting with producers every day so we're starting to get the ball rolling on album six. I don't know what I can say, but we're definitely planning on starting the record some point in the near future."
The bassist added that frontman Caleb Followill has been writing "a lot" for the new album, saying: "Caleb has been writing a lot, and yeah, I think it's going to go really well."
Meanwhile, Jared is preparing the debut EP release of his and Nick Brown of Mona's side-project Smoke & Jackal. The duo will release the six track collection 'EP1' on October 15.