Watch Dave Grohl Join Paul McCartney To Perform A Beatles Classic In London

Dave Grohl, fresh off joining David Letterman for his farewell show on Wednesday night, decided to drop in on another legend Saturday night. Namely Paul McCartney during the former Beatle’s show at the O2 Arena in London. Together the duo busted out a rocking cover of “I Saw Her Standing There” and created a special moment for the folks in attendance.

But according to Rolling Stone, Grohl’s appearance wasn’t even the biggest surprise of the night. That belongs to McCartney’s first live performance of his weirdest song, “Temporary Secretary” from the album McCartney II. It’s an odd choice, but it’s noteworthy and a treat for those McCartney fans out there.