Mary Danielle Lambert (born May 3, 1989) is an American singer, songwriter and spoken word artist.

"[5] Her debut EP, Letters Don't Talk, was released on July 17, 2012, and peaked at number 18 on the iTunes Singer-Songwriter charts.

[9] Lambert's studio album Heart on My Sleeve was released on October 14, 2014, and debuted at number 29 on the Billboard 200.

[11] She was raised as a Pentecostal Christian, but her family was expelled from the church when she was six years old because her mother had come out as a lesbian.

Later Lambert became an evangelical Christian, attending Mars Hill Church beginning when she was in high school.

[5] Lambert moved to Seattle in 2007 studying at Cornish College of the Arts and graduated with a Bachelor of Music in composition.

[18] In 2008, Lambert represented Seattle, Washington in Brave New Voices International Poetry Competition, which was filmed on HBO.

[22] The book has received positive reviews, with one critic stating that it was "moving and strikingly original exploration".

[23] In the summer of 2013, Lambert released her solo debut single, "She Keeps Me Warm", which samples the chorus that she wrote for "Same Love".

On December 17, 2013, Lambert released her debut major label extended play Welcome to the Age of My Body under Capitol Records.

[32][non-primary source needed] A music video for Lambert's "Body Love" Part 1 and 2 was released on April 22, 2014.

[35] In October 2014, Lambert's debut album Heart on My Sleeve was released and included the hit "Secrets" which peaked at number one on the U.S. Dance chart.

[37][non-primary source needed] In July 2016, she released a single titled "Hang Out With You" and a music video for the song.

[41] In April 2021, Lambert made her acting debut in the animated musical film Arlo the Alligator Boy as a tall and lonely human girl named Bertie.