McLean A Tree-Lighting Ceremony featuring "American Idol's" Kris Allen and WASH-FM's Loo Katz and Chilli Amar was held on Friday, Nov. 18 at Tysons Corner Center's Plaza area near the ice skating rink. Allen, who won Season Eight of "American Idol," performed from his new Christmas Album "Somethin' About Christmas." Meteorologist Doug Hill also did a live broadcast during the event. The Fairfax Choral Society's Youth Choir sang holiday songs and Santa was there to take photos with the crowd.