Christmas in Rockefeller Center

8 pm/ET, NBC What's 71 feet tall, 40 feet wide and about to make the season REALLY bright? Nancy O'Dell and Al Roker throw the switch on the massive Norway Spruce sprucing up Mid-Manhattan, surrounded by guests Chris Isaak, Jessica Simpson, Clay Aiken, Kenny Chesney and the always-luminous Vanessa Williams. Damian J. Holbrook