Fox looked stunning as she arrived to her birthday dinner at Giorgio Baldi in Santa Monica on Saturday evening ... display in a graphic T-shirt and purple sequined pants to celebrate the special ...

This isn't the only time we've seen Sonja wear ... top for "cocktails and conversation" (as Dorinda Medley put it) at Ramona Singer's NYC apartment, and it worked quite wonderfully for the evening ...

The Season 4 Project Runway winner's most recent collection presents a futuristic take on evening wear, complete with sequined pants ... scheme included royal purple, black, white, silver, and ...