On Wednesday night, the 80-foot Norway spruce in New York City's Rockefeller Center was lit.
The tree was covered in more than 45,000 LED lights...
...and topped with a Swarovski crystal star.
Thousands of New Yorkers and tourists came out to watch the ceremony.
The NYPD were on call for crowd control.
Cee Lo Green performed.
So did Rod Stewart.
And, of course, the iconic Rockettes.
The tree will remain lit until Jan. 7.
Keep up with the latest daily buzz with the BuzzFeed Daily newsletter!