As if seeing Sir Paul McCartney wasn’t enough, the crowd at his second Desert Trip gig got to see a very unexpected guest as the singer welcomed Rihanna to the stage to perform their massive hit “FourFiveSeconds.”

“We finally found someone under the age of 50,” McCartney joked as Rihanna left the stage following the performance, making light of the Desert Trip demographic.

“FourFiveSeconds,” also co-written by Kanye West, has been a mainstay in both Rihanna and Paul McCartney’s set lists since the single’s arrival in January 2015. McCartney and Rihanna’s “FourFiveSeconds” duet at Desert Trip marked the first time the singers had performed the track together since the 2015 Grammy Awards.

Watch the performance below:

photo via : Pitchfork

Filed under: Concert, Desert Trip, Music, Paul McCartney, Rihanna