Well folks, Apple has begun their iTunes 12 Days Of Christmas celebration right on schedule. For the third day, Apple is giving away a free song and music video of Lady GaGa’s Marry the Night. Remember, this only lasts for 24 hours and there will be something new tomorrow you can get for free as well. PocketFullOfApps will keep you up to date on all the latest iTunes 12 Days Of Christmas news and promotions.