Lady Gaga turns 30 years old on Monday, and to celebrate the major milestone, the singer had a star-studded Birthday bash at the ** Name club in LA on Saturday night. In addition to Lady Gaga's fiancé, Taylor Kinney, stepping out, Taylor Swift, Lorde, Nick Jonas, Lana Del Rey and Kate Hudson all made stunning appearances at the big event. Kate even took to Instagram to share a ***y mirror selfie before the party, writing, "#repost @sophielopez #Dejavu #Saturday #LetsGoCelebrateALadiesBDay."