The duet appears on the soundtrack to Musgraves' new holiday special, "The Kacey Musgraves Christmas Show," which premieres on Amazon Prime Video this Friday, November 29.
The full-length includes a handful of new original songs by Musgraves, as well as holiday standards such as "Have Yourself A Merry Little Christmas," "Rockin' Around The Christmas Tree" and "I'll Be Home For Christmas."
For her second Christmas album, the country superstar dueted with several fellow chart-toppers such as Camila Cabello, Troye Sivan and Lana Del Rey.
"Christmas Eve will find me/Where the love light gleams/I'll be home for Christmas/If only in my dreams," Musgraves and Del Rey sing in unison in "I'll Be Home for Christmas," over a soft acoustic guitar.
Narrated by Dan Levy of "Schitt's Creek," "The Kacey Musgraves Christmas Show" features guest appearances by Zooey Deschanel, Fred Armisen, Leon Bridges, James Corden and the Radio City Rockettes among others.
"Some truly brilliant comedic and musical guests are featured in the show -- as well as my own Grandma. My vision was to bring my old Christmas album to life visually and create a modern and fashionable, fresh take on a classic format. It's a nostalgic, Wes Anderson-inspired reimagining of the holidays. It's heartfelt, funny, and most of all, real. I can't wait to finally share," Musgraves said of her upcoming holiday special in a statement.
Earlier this month, Musgraves also unveiled the new song "All Is Found," which features in the soundtrack for "Frozen 2" alongside contributions by Panic! At the Disco and Weezer.
In addition to appearing on "The Kacey Musgraves Christmas Show," Lana Del Rey unveiled her sixth studio album, "Norman F*****g Rockwell!", last August.
Discover Del Rey's latest duet with Musgraves for a cover of Bing Crosby's "I'll Be Home for Christmas":