Lady Gaga doesn't officially turn 30 till tomorrow (March 28). However the "Til It Happens to You" singer celebrated her milestone birthday with a big party at No Name club in Los Angeles on Saturday night (March 26).

With her fiance, Taylor Kinney, on her arm, Gaga went for full 80s glam. She wore a gold sequined off-the-shoulder mini dress with a big black belt to show off her slim waist. The chic gala was filled with the biggest of stars including Taylor Swift, Nick Jonas, Lorde, Lana Del Rey, Lisa Rinna and Harry Hamlin, Kylie Minogue, Lisa Vanderpump, Mark Ronson and Pharrell.

Fresh off of celebrating her baby shower, Chrissy Teigen and her boo, John Legend, matched in all-black outfits for Gaga's affair. And apparently it was the couple's big date night as they went to see comedian Dave Chappelle's show before heading to the party.

Kate Hudson made it a girls night by bringing along gal pal and stylist Sophia Lopez as her date to the birthday bash.

Despite Gaga's reported no-gift policy, she did receive a rare Michael Jackson sketch called "Dancing Feet." TMZ reported that another version of the same sketch sold in 2010 for about $25,000. American Horror Story co-star Kathy Bates also revealed that Lady Gaga put on a special performance but didn't say much else except that she did amazing.

See some clips from outside the Lady Gaga's 30th birthday party here.

Watch Lady Gaga's Best Live Vocals