Lady Gaga and Terrence Koh Auction Famed Piano

Two young artists who are turning the pop culture world upside down, Lady Gaga and Terrence Koh, joined forces last month in Toyko for GAGAKOH!, a legendary performance at club Tabloid. Only 900 lucky guests got to witness the debauchery. Koh created a one-of-a-kind piano for the event, in his signature white, as well as a five-foot-tall papier-mâché bunny head, a tribute to his spirit animal.

This month, they're auctioning off the piano and bunny head, which is signed by Gaga herself, through CharityBuzz to benefit the Art of Elysium, an amazing organization that encourages leading artists to dedicate their time and talents to kids undergoing serious medical treatments, empowering them through creative outlets. Past supporters of Elysium include Kanye West, Graham Nash, Eva Mendes, Joaquin Phoenix, Elijah Wood, David Lynch, Hugh Jackman, Ben Affleck, and many more.

Koh and Gaga first collaborated for the 2010 Grammys, designing the two-headed piano that Gaga played with Elton John. He has since designed the piano Gaga played for the February AmfAR Gala and most recently the GAGAKOH! instrument. As Gaga and Koh continue to use these 88 pearl designs for her over-the-top performances, here's your chance at obtaining a piece of art and pop culture history, while benefitting a more than worthy organization. Bidding ends Thursday, May 13 at 1 PM EST.