Mark Ronson and Justin Theroux Host Epic Celebrity-Filled Holiday Party

Mark Ronson, the musician known for hits like "Uptown Funk, " and Justin Theroux, the actor from "The Leftovers, " threw a big holiday bash at Pebble Bar. This spot is a celeb hangout with a secret entrance under Rockefeller Center. The party was their third annual event, and they managed to get Gho