Late on Friday, New York became the sixth (and most populous) state in the nation to pass a law allowing gay marriage, and in celebration, stars joined supporters of the measure to cheer the historic milestone on Twitter. Pink gave an all-caps jump for joy, shouting, "CONGRATULATIONS!!!!! ABOUT TIME!" Harris tweeted, "It PASSED! Marriage equality in NY!! Yes!! Progress!! Thank you everyone who worked so hard on this!! A historic night!" His elated partner, David Burtka, announced, "I've already...