Carrie Underwood is known for her love of ball gowns but she kicked it with simple black leggings and a very special tee to team up with Miranda Lambert to raise awareness and support for kids with cancer.
MORE: Miranda Lambert's love story with husband Brendan Loughlin is like something from a movie
The country stars were among a group of singers who have joined the campaign for St. Jude Children's Research Hospital this holiday season.
WATCH: Carrie Underwood's Christmas in Rockefeller Center performance
Carrie wore her blonde hair super straight as she smiled in a pair of black leggings, and the grey crew-neck tee which reads "Love Music Stop Cancer."
Miranda was joined by her fellow Pistol Annies' stars Ashley Monroe and Angaleena Presley.
MORE: Miranda Lambert delivers very sweet adoption news ahead of Christmas
MORE: Carrie Underwood wows in extravagant red ball gown in jaw-dropping photo
The three held the tee in front of them as they rocked all-black outfits.
Dancing with the Stars' hopeful Jimmie Allen has also joined the campaign, part of fundraising program #MusicGives to St. Jude Kids.
Carrie wore her blonde hair super straight
Maren Morris, Carly Pearce and Kane Brown are also all involved.
The Memphis, Tennessee hospital never charges parents a bill for treatment, travel, housing or food.
It also also uses art therapy, including music, to work with the children and help reduce pain and anxiety.
Miranda was joined by her fellow Pistol Annies' stars Ashley Monroe and Angaleena Presley
Carrie and Miranda often team up for big charity moments but the pair have a personal celebration coming soon, as both have been nominated for two Grammys, capping off an incredible year.
Both singers are nominated in the best country duo/group performance category.
Dancing with the Stars' hopeful Jimmie Allen has also joined the campaign
Carrie for her duet with Jason Aldean, and Miranda for her work with Elle King.
Carrie is also up for best roots gospel album for My Savior, and Miranda for best country album for The Marfa Tapes, a collaboration with Jon Randall & Jack Ingram.
Maren Morris, Carly Pearce and Kane Brown are also all involved
"I could not be more happy to celebrate TWO Grammy noms today with some of my closest friends," Miranda shared with fans.
"One for best country album and one so dear to my heart The Marfa Tapes with @jackingram and @jonrandallmusic and with my bad ass gal pal @elleking for our song Drunk."
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