Brett Eldredge

His days of being a celebrity dog are behind him.

On a recent episode of 'The Kelly Clarkson Show', the two artists finally met -- and they performed their new holiday duet, too.

The upbeat, festive love song, penned by Clarkson, arrived on Wednesday (Oct. 28), just under two months out from the year-end holiday.

See if you can keep a dry eye.

It's the title track of Brett Eldredge's forthcoming new album.

He changed his approach dramatically for his new music.