As we await Katy Perry's return to Zuccotti Park, and with it a captivating and politically minded "Teenage Dream" remix, there are other musicians who aren't afraid to jump into the movement through song from the get-go. Adding to the playlist that's grown out of Occupy Wall Street in New York, Sean Lennon and Rufus Wainwright hit somewhat at the center of the protestors' ideals with an upbeat take on Madonna's "Material Girl." Wainwright seems more concerned with getting the lyrics down while Lennon focuses on encouraging an already lively crowd. (Nice tambourine.) Lest you think these two are too famous for sheet music, they aren't afraid to check back with their original lyrics throughout the number. They are the 99%, after all.