RaeLynn was born in a very musical family who sang at church. One of her inspirations was her brother Jake who is part of Grammy-nominated band Leeland. At the age of 11, she took interest in country music after listening to "Me and Charlie Talking" by Miranda Lambert. She graduated at the top of her class in 2011. Before she began her music career she aspired to be an actress, as she auditioned to play the "country girl" for a number of Disney and other theatrical productions, one being Mr. Popper's Penguins. In her early teens she began to pick up her guitar more frequently and started writing more songs. Her songwriting skills proved to be more successful than her acting ability, but she has recently brought the two together in her new music video, God Made Girls.
RaeLynn auditioned for the second season of The Voice after being encouraged by a contestant on Team Adam who wrote songs with her. Her audition song was "Hell on Heels" by Pistol Annies, Miranda Lambert's group. Both Adam Levine and Blake Shelton wanted her on their team, but she eventually chose Team Blake. She sang "Free Fallin'" against Adley Stump in the Battle Rounds and won. Her victory was, however, highly contested, and Blake publicly defended his choice in a Twitter war. She then went on to the live shows to perform "Wake Up Call" by Maroon 5 and "She's Country" by Jason Aldean and the latter later became her best selling cover on the show. For her last-chance performance, she sang "If I Die Young" by The Band Perry, but was chosen over Erin Willett and thus eliminated.
She is currently signed to Republic Nashville, and is working on a studio album that will be recorded after she finishes her radio tour. The songs for the upcoming album have already been written with her involvement on every track. She has also written with Natalie Hemby, Jon Randall, John Wiggins, and fellow Voice contestants Nicolle Galyon and Hailey Steele.
She has since performed a song co-written with Miranda Lambert entitled "Lie", and returned with fellow finalists Chris Mann and Juliet Simms to perform at the semifinal results show on the third season of The Voice, performing her new single, "Boyfriend". "Boyfriend" later charted on the Bubbling Under Hot 100 Singles chart, which acts as a 25-song extension to the Hot 100, thus making her the first contestant to chart on one of Billboard's overall singles charts for post-Voice activity. The single sold 27,000 copies in its debut week.
She is featured on backing vocals for Blake Shelton's 2013 single, "Boys 'Round Here", which debuted at No. 67 on the U.S. Billboard Hot 100 chart, and peaked at No. 16. The song is also featured on Shelton's album, Based on a True Story…. She was signed to Dr. Luke's publishing label Prescription Songs in April 2013.
RaeLynn's debut single to country radio, "God Made Girls", was released on July 1, 2014. On December 2, 2014, RaeLynn performed her single on season 7 of The Voice.
On January 13, 2015, RaeLynn released an EP through Valory Music Co. titled Me. The EP debut at No. 49 on the Billboard 200, and No. 7 on the Top Country Albums chart, with 5,500 copies sold in its debut week.