By Joey Nolfi
Updated October 16, 2016 at 09:05 PM EDT
Credit: MJKIM/MPL Communications via Getty Images

Rihanna joined legendary singer-songwriter Paul McCartney for a surprise performance of their 2015 hit single “FourFiveSeconds” over the weekend.

The “Needed Me” hitmaker made an unexpected appearance during McCartney’s Saturday set at the Desert Trip music festival in Indio, California. Together, they performed the double-platinum single for the first time since they took the stage with Kanye West at the 2015 Grammy Awards.

“We finally found someone under the age of 50,” McCartney joked as Rihanna left the stage, poking fun at the mature crowd that makes up the festival’s inaugural lineup, which also included the Rolling Stones, Bob Dylan, Neil Young, Roger Waters, and The Who.

“FourFiveSeconds” peaked at No. 4 on the Billboard Hot 100, though it was ultimately not included on a studio album by any of its three collaborators.

Watch McCartney perform “FourFiveSeconds” with Rihanna below.