Paris Hilton. XNY/Star Max/GC Images Paris Hilton redefined the little black party dress. Hilton, 43, marveled in an LBD while making an appearance on the Late Night With Seth Meyers on Monday, December 9. Her glittery ensemble featured an off-the-shoulder neckline, long sleeves and a fitted skirt that cascaded to her ankles. Hilton added even…