The Born This Way singer, who turned 30 today, headed to the No Name Club in Hollywood, clad in a metallic dress, to ring in her big day with a host of famous friends on Saturday.
Among the guests included Taylor Swift, Lana Del Rey, Lorde, Kate Hudson, Pharrell Williams, John Legend and his pregnant wife Chrissy Teigen, Kathy Bates, and Gaga's actor fiance, Taylor Kinney.
