Sean Lennon and Rufus Wainwright Cover Madonna at Occupy Wall Street

Zuccotti Park is becoming an increasingly popular venue for artists across the board to stop by and make an appearance. Some artists, like Jeff Mangum roll through and give intimate performances; some, like Kanye West, waltz through without saying anything at all; and some, like Radiohead, don't come at all. So, it came as no large surprise when musical progeny of musical prodigies Sean Lennon and Rufus Wainwright stopped by Occupy Wall Street on Sunday night. What did come as a surprise was their choice of song.

The duo, plus Lennon's girlfriend Charlotte Kemp-Muhl and protesters who are vehemently against fracking, put together an ironic, one-off rendition of Madonna's 'Material Girl' with some solid accompaniment from the Occupation (which is actually a pretty awesome name for a backing band).

Perhaps a song that was more overtly tongue in cheek than one about somebody who couldn't be happier courting riches would've played better, but the Occupy crowd seemed to love it, especially as it was dedicated to Fed chairman Ben Bernanke. Keep an eye out for the banjo and accordionist (Muhl) in the background, just killing it (much respect to anyone who keeps an accordion handy).