Disco ain't dead because Beyoncé said so. On Monday night, while you were dreading going back to school or work, Bey and co. were busy gettin' down with their bad selves at the NoMad Hotel rooftop to toast the Queen's 35th birthday. Jay and Blue were of course in attendance, as well as Diddy, Alicia Keys, June Ambrose, and fellow Destiny's children, Michelle Williams and Kelly Rowland. No one does a theme party better than Beyoncé, these photos prove it.