Rihanna and Paul McCartney Stun Crowd at Desert Trip Festival

Paul McCartney surprised fans at the Desert Trip festival on Saturday by introducing Rihanna to the stage.

The ex-Beatle stormed through a two-and-a-half hour set of hits at the California festival last weekend, and was back for more on Saturday, when he welcomed Rihanna to the stage for a rendition of their hit collaboration “FourFiveSeconds.”

“We finally found someone under the age of 50,” McCartney joked about the festival, which has featured performances from The Rolling Stones and Bob Dylan.

Neil Young also joined the 74-year-old again onstage to perform “A Day in the Life,” which was mashed up with John Lennon’s “Give Peace a Chance” and “Why Don’t We Do It in the Road?” – just like they did the week before.

The performance came two days after McCartney hit the stage on Thursday at Pappy & Harriet’s Pioneertown Palace in nearby Pioneertown.

“This is the biggest gig we’ve ever played,” McCartney said at the gig, where he performed hits including “Ob-La-Di, Ob-La-Da,” “A Hard Day’s Night,” “I Saw Her Standing There,” and “Hey Jude.”

McCartney is clearly enjoying his time in the desert – he showed up in a VIP suite on the first night of the festival last weekend to watch The Rolling Stones perform and cheered and pumped his fist in the air when the band performed a cover of The Beatles’ “Come Together” during its set at the inaugural Desert Trip.

The two-weekend festival wrapped up on Sunday night with sets from The Who and Roger Waters.