Mother Monster partied at the No Name restaurant in West Hollywood, California, on Saturday night with her fiance, Taylor Kinney, and a bevy of A-list pals
The "Born This Way" singer channeled '80s prom queens for the night, rocking a short gold dress with giant puffy sleeves and ultra-high black platforms. Even though Gaga's makeup was toned down from her trademark over-the-top look, the overall style was super glam.
The bash was attended by many of Gaga's A-list pals, including Taylor Swift, Lorde, Kate Hudson, Nick Jonas, Lana Del Rey, Chrissy Teigen and John Legend, Pharrell, Ashlee Simpson and Evan Ross, Kathy Bates, Kylie Minogue, Lisa Vanderpump, Suki Waterhouse, Lisa Rinna and Harry Hamlin, and Mark Ronson.
Hudson posted to Instagram before heading to the party, captioning the photo with the hashtag "#LetsGoCelebrateALadiesBDay."