Jay Z during an after party at Top of The Standard following the Metropolitan Museum of Art's annual Costume Institute gala in New York, May 5, 2014. D.J. Mia Moretti kept the mood festive with an eclectic mix that included Iggy Azalea, Disclosure and, of course, Beyonce, who took to the dance floor several times, mixing it up with Jenna Lyons, Naomi Campbell and others. (Casey Kelbaugh/The New York Times)