Loretta Lynn's musical journey will be told this March in the form of a documentary called Loretta Lynn: Still a Mountain Girl on PBS. In a new three-minute teaser clip, Lynn discusses her friendship with frequent duet partner Conway Twitty as footage is shown of the two performing "Louisiana Woman, Mississippi Man." It was a song that Lynn's husband Doolittle suggested the two record, thinking it was a sure hit — and it was.

Additionally, Garth Brooks and Trisha Yearwood are interviewed and share their take on Lynn and Twitty's memorable duets and sing a portion of "After the Fire is Gone."

"When these two voices hit, it creates this dimension that you can't get singular without one without the other," Brooks explains of Lynn and Twitty's voices.

Meanwhile, Brooks' wife, Yearwood, shares her take on the famous duet partners.

"And that's why I've always enjoyed singing with Garth for the last 25 years. There's an energy there that's created together that isn't separate," she adds. "It doesn't take anything away from the singular artist, but it's something different. There's an energy there. I think that's why everybody thought Loretta and Conway were married or at least having an affair because it was such a connection and it just worked hit after hit after hit."

Lynn laughs at the idea that she and Twitty "had a thing." "That's the furthest from the truth. I loved Conway as a friend and my husband loved him," she proclaims.

Loretta Lynn: Still a Mountain Girl premieres on PBS on March 4, the same day Lynn will release her next album, Full Circle. Sissy Spacek — who won on Oscar for her portrayal of Lynn in the 1980 film adaptation of her best-selling autobiography, Coal Miner’s Daughter — as well as Miranda Lambert, Reba McEntire and Willie Nelson also appear in the documentary.

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