The Museum of Contemporary Art holds a lot more than just priceless works. This weekend, the L.A. art gallery hosted a 30th anniversary gala attended by dozens of celebs, including Brad Pitt and Angelina Jolie, Jessica Alba, Gwen Stefani and Gavin Rossdale, and Pierce Brosnan.

Undoubtedly the biggest splash of the event was Lady Gaga, as usual. Performing in Franceso Vezzoli’s Ballets Russes Italian Style (The Shortest Musical You Will Never See Again), Lady Gaga played a pink piano covered in blue butterflies designed by artist Damien Hirst for the performance art piece.

Vezzoli is known for merging celebrity and fine art. His latest exhibition is called Greed: A New Frangrance by Francesco Vezzoli and plays with the strategy of launching a commercial fragrance like so many celebrities try.

Lady Gaga was a welcome guest at the event, donning an elaborate Japanese Geisha-like couture costume.

“I’m in love with her,” Vezzoli told the Wall Street Journal Saturday night. “She’s managed to be a powerful artists without being a product of the system.”

Lady Gaga weighed in on the contemporary art world in an interview with the Wall Street Journal at the gala, seated alongside celebrity photographer David LaChapelle and  gossip blogger Perez Hilton.

“For me, art is a lie, and the artists are there to create lies we kill when we make it true. Francesco and I were like warriors on stage, trying to make a true moment,” Lady Gaga said. “Art is life, life is art – the question is what came first?”

It’s been a busy week for Lady Gaga, whose latest video for “Bad Romance” premiered with heavy rotation on the Internet, and will guest star on tonight’s Gossip Girl following much anticipation.

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