Rockefeller Christmas tree lights go ON! Thousands turn out (and BOO) de Blasio as he hits the button after performances by Diana Ross, John Legend and Tony Bennett to kick off holiday season

The famous Rockefeller Center Christmas Tree lights have now been turned on as part of the longstanding tradition that ushers in Christmas time in New York City.

New York City Mayor Bill de Blasio flipped the switch on Wednesday night to light the Christmas Tree following a televised extravaganza that featured performances by Diana Ross and Tony Bennett.

The 72-foot-tall tree is decorated with 5 miles of multicolored LED lights and a 900-pound Swarovski crystal star.

Rockefeller Center has hosted the annual ceremony since 1931.