4-gwen-nicole-460-fx.jpg5-gwen-gavin-nicole.jpgGetty Images for Wallis Annenberg Center for the Performing Arts

Demi Moore and Rachel Zoe weren't the only ones buddying up last night at the Wallis Annenberg Center for the Performing Arts opening gala! After posing for pictures on the red carpet, a pregnant Gwen Stefani and new bestie Nicole Richie posed for several inside. Who knew these gals were pals?

Gwen showed off her baby bump in a silver Ferragamo dress, and Nicole looked fab in a printed number (and what we hope was a faux fur stole), but we were surprised at how minimal her makeup was.

The Annenberg facility has been under construction for a decade, and it now has two theaters for concerts, plays, dance performances and drama classes for the youth of Los Angeles. Guests dined on filet mignon over white truffle risotto and there was a fashion show by event sponsor Salvatore Ferragamo, along with a performance by Italian tenor Vittorio Grigolo. Fancy!