Rihanna surprised fans at Desert Trip in California on Saturday night by joining Paul McCartney on stage for a performance of their hit “FourFiveSeconds."
“We finally found someone under the age of 50," McCartney said -- a jab at the demographic of the festival, which has been dubbed “Oldchella.”
In addition to the former Beatle, the line-up included The Rolling Stones, Neil Young, Bob Dylan, The Who, and Roger Waters of Pink Floyd.
McCartney, 74, and Rihanna, 28, teamed up with Kanye West in 2015 to perform “FourFiveSeconds” at the Grammys.
The song has since been covered by several artists, including Canada’s Drake.