NEW YORK - Christine Quinn, New York's highest-ranking openly gay official and the leading candidate to be the city's next mayor, married her longtime girlfriend on Saturday, walking down the aisle to Beyonce's "Ave Maria."The wedding came less than a year after New York Democratic Governor Andrew Cuomo signed a law legalizing same-sex marriage in the state, whose first same-sex nuptials were held July 24.Quinn, the speaker of the New York City Council and a vocal advocate of same-sex marriage, wore a full-length, cream-colored gown designed by Carolina Herrera and a hair comb fashioned with family heirlooms.Quinn's wife, New York lawyer Kim Catullo, wore a cream silk evening suit designed by Ralph Lauren. Catullo, who like Quinn is 45, walked in to Bruce Springsteen's "If I Should Fall Behind."Cuomo, New York Mayor Michael Bloomberg and Police Commissioner Ray Kelly were among the 275 guests.Before the reception, several politicians expressed hopes that same-sex marriage will be legalized across the country."It's not a question of if but when - everywhere," US Senator from New York Charles Schumer said.