NEW YORK — Christina Aguilera is celebrating Pride in the Big Apple. Heritage of Pride — the volunteer-directed group behind the official NYC Pride roster of events — said Wednesday the global music superstar will headline this year’s Pride Island, the traditional dance party and fundraiser that closes LGBTQ Pride festivities in New York City each June. This year, the rainbow-powered party heads to the Brooklyn Army Terminal, a massive warehouse complex in Sunset Park, on the South Brooklyn waterfront. Organizers promise an afternoon of “exuberant dancing, lights and music” — and, of course, t...