It was a star-studded evening at the MOCA in LA last night, as Gwen Stefani, Gavin Rossdale, and more attended the opening of the Art in the Streets, the first major retrospective of graffiti art in the US. Gwen and Gavin are longtime supporters of the museum and its director, Jeffrey Deitch, after stepping out for another event there last Fall. Drew Barrymore and her red hair also made a cameo after she debuted the new hue Wednesday night at a book party. Other celebs like Adrian Grenier, pregnant Pink, and Christina Ricci were on hand to toast icons like Shepard Fairey and Thierry Guetta, the star of last year's documentary Exit Through the Gift Shop. Shepard and Thierry's work is represented there along with pieces by Banksy.