The 73-year-old legend was joined on stage by Brittany Howard as they delivered a wonderful rendition of McCartney’s “Get Back”.

Paul McCartney delivered yet another brilliant performance at Chicago’s Grant Park this weekend, which hosted the 2015 edition of Lollapalooza. His set, a booming 31-song performance, lasted over two hours and included a surprise feature from Brittany Howard, frontwoman of Alabama Shakes as they, quite amiably, played a stirring rendition of McCartney’s “Get Back”.

These are the moments that make a festival. The assiduous amalgamation of two incredible musicians in a moment held in time is all it takes.

Watch the video below to get a glimpse of the action at Lollapalooza. And don’t forget to keep an eye on The Sherp For more news.