By Aly Semigran
Updated October 25, 2011 at 09:03 PM EDT

Over the weekend, Sean Lennon, Rufus Wainwright, “and a whole bunch of other people” joined the ever-increasing list of artists — which thus far has included the likes of Talib Kweli, Rage Against the Machine’s Tom Morello, Neutral Milk Hotel’s Jeff Mangum, members of the punk band Anti-Flag, and folk legends Pete Seeger and Arlo Guthrie — to perform for the protesters taking part in the Occupy Wall Street movement.

On Sunday night, Lennon alerted his Twitter followers (as so many celebrities, like Alec Baldwin and Russell Simmons, have been doing) that he was en route to the downtown Manhattan park, which has become home for many of those involved with OWS. The singer, perhaps following in the footsteps of mother Yoko Ono — who was one of the first famous faces to show her support for OWS (she tweeted after her visit, “I love #OccupyWallStreet As John said, “One hero cannot do it. Each one of us have to be heroes.” And you are. Thank you”) — posted photos of his visit and wrote, “The revolution is televised!”

But it was Lennon’s performance with other artists and friends, including fellow son-of-rock-music-royalty Rufus Wainwright, that will, undoubtedly have some fans coping with some serious wish-I’d-been-there envy. As Lennon previously promised on Twitter, he’d be performing during his time at OWS, but no one could have guessed it was going to be a spirited, acoustic cover of Madonna’s pop — albeit seemingly non-political — anthem “Material Girl.”

Watch the full performance below. But, if you want to skip over the arguably grating OWS “human microphone” (which was brilliantly covered by John Oliver on The Daily Show last week), the song starts around the 8:45 mark:

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