Loretta Lynn celebrated her 85th birthday on Friday night (April 14) with the first of two concerts at Nashville's Ryman Auditorium. Although the country icon wasn't looking to make the night into a celebration of her big milestone, the crowd -- and a special guest -- had other plans.

Twice during Lynn's Ryman concert, the audience broke out into renditions of "Happy Birthday" for the singer-songwriter: First, they did so alone, as Lynn was taking a break in between songs to tell stories. But then, when Martina McBride appeared onstage with a bouquet of yellow roses, they did it again; readers can press play above to watch the special moment.

At Lynn's request, McBride stayed onstage to perform "You Ain't Woman Enough (to Take My Man)" and "I Saw the Light." The former song, released by Lynn as a single in 1966, became a Top 5 (No. 2) country hit for the artist; McBride covered the song on her Timeless album, released in 2005. Readers can watch a snippet of their performance below.

Loretta Lynn Through the Years

“Beyond honored to be asked to present @lorettalynnofficial with roses and lead the crowd in singing happy birthday to her,” McBride writes on Instagram. “I absolutely and completely adore her. She is a trailblazer, original, one-of-a-kind living legend. And it blows me away that she calls me her friend.”

In addition to McBride, Rolling Stone reports that Lynn's sisters Crystal Gayle and Peggy Sue Wright, as well as her granddaughter Tayla Lynn and great-granddaughter Emmy Rose Lynn, performed with Lynn during her Friday night Ryman show. Margo Price sang with Lynn during her Saturday night (April 15) concert.

On Aug. 18, Lynn will release a brand-new album, Wouldn't It Be Great. The following week, on Aug. 25, an exhibit about Lynn will open at the Country Music Hall of Fame and Museum.

Watch Loretta Lynn + Martina McBride Sing "You Ain't Woman Enough (to Take My Man)"