Tens of thousands of people are expected to come out tonight for the annual Christmas tree lighting ceremony at Rockefeller Center. The 74-foot Norway spruce will be illuminated by 30,000 lights. The tree was cut down in Pennsylvania and put in place earlier this month. The lighting ceremony begins at 7 p.m. Justin Bieber and Faith Hill will be serenading the crowd, and the Radio City Rockettes will also be on hand.