Treasure Island Music Festival washed ashore in San Francisco this past weekend, bringing with it live music from Beck, Atoms for Peace, Sleigh Bells, Haim, and many more. SPIN already collected the Best Live Photos from the annual festival, but now we’ve found another gem (via Stereogum): Fan-shot footage of Beck playing “Let’s Get Lost,” his Bat for Lashes-assisted contribution to the soundtrack for 2010 blockbuster The Twilight Saga: Eclipse. Natasha Khan wasn’t on-hand to lend her vocals to the live rendition, so the Sea Change crooner called upon Sleigh Bells’ Alexis Krauss to fill in as co-star. As seen in the clip, the Bitter Rivals siren turned down her ususal aggro charm (see it in full flourish on a recent Jimmy Kimmel Live! broadcast) to deliver a tuneful supporting performance backed by thundering percussion. Watch the duet above, and review the other talent by flipping through SPIN’s Best Live Photos of Treasure Island 2013.