WATCH: Eldredge's performance from last year:

The tree lighting tradition began 88 years-ago as a symbol of hope during the great depression. From that came a new tradition which has now grown into one of NBC's most treasured holiday events. The network airs the special live from New York each year featuring familiar hosts, celebrity guests, and live musical performances.

"It's a year we need it more than ever. I think NBC has really, really went into it knowing that. Very aware that we wanna bring something special and I think, uh- this has been the...actually, honestly this is the most special one I've been a part of."

NBC has had to take a bit of a different approach this year in order to accommodate for social distancing while following pandemic guidelines. The COVID-19 pandemic has taken a large toll on the television industry, but NBC is doing everything they can to continue forward safely as they recently did with their altered Macy's Thanksgiving Day Parade. Still, the tree will be lit behind a beautifully designed set with plenty of room.

"The set is one of the coolest Christmas sets I've ever seen. Kelly and I couldn't- we couldn't stop talking about it. It's really cool."

Brett Eldredge also told Advocate Channel what it was like working and performing with fellow singer Kelly Clarkson:

"Man, that- just the energy of us connecting together was one of the coolest things I've ever got to do. Kelly, she's one of the best humans that I've ever met...vocally and virtually. She's just an amazing person."

The two worked on their song Under the Mistletoe online and in quarantine. Though they could not record it in the same room, tonight they're together on stage for the first ever performance of the song.

Listen to their song now!

Don't miss the television event Christmas In Rockefeller Center tonight on NBC and streaming on Peacock!