Rihanna is officially Queen of the Olds.

In case you weren't already aware, “Oldchella" — officially titled Desert Trip — happened over this past weekend. The music festival in Indio, California (the same setting as Coachella) boasted a roster of classic rock legends like Bob Dylan, Neil Young, The Rolling Stones, Roger Waters and The Who (averaging a staggering 71.7 years old, as Paste pointed out earlier this year.) And, of course, Paul McCartney.

During the Beatles legend's solo set on Saturday night (Oct. 15) of the music festival, Paul's ol' pal RiRi came unexpectedly sauntering onstage to perform their Kanye West collaboration, "FourFiveSeconds," as TMZ reports. (Sadly, Ye was not in attendance.)

“We finally found someone under the age of 50,” McCartney reportedly joked to the crowd following their surprise duet. Looks like Rih's still earning herself some new (well, old) fans.

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