[6] In 2010, while a trainee under JYP Entertainment, Baek moved to New York for two years where she spent her time practicing English, singing, and dancing.

[8] On September 27, 2012, it was revealed that Baek will debut as part of a duo along with K-pop Star season 1 winner Park Ji-min called 15&.

[17] In February 2016, Baek graduated from Hanlim Multi Art School alongside 15& member Park Ji-min and Yugyeom of Got7.

[21][22] In 2017, Baek performed her then unreleased song "Square" at a festival in Han River while wearing a green dress, and the fan-taken video which was uploaded to YouTube instantly became a hot topic and continues to garner views.

[10] On September 13, Baek announced that her contract with JYP Entertainment ended, and that she was leaving to create her own independent record label.

Her single "Square (2017)" also made Baek the first South Korean artist to top the charts with a song sung entirely in English.

[36] On May 11, 2021, Baek's band, The Volunteers, joined her independent label, Blue Vinyl, and launched their self-titled debut album on May 27, after previously making their music solely available through SoundCloud and YouTube.

[37] On September 10, 2021, Baek released her first cover and fourth EP, Love, Yerin, featuring six remake tracks from artists such as Nell and The Black Skirts.

[40] On September 19, 2022, Baek announced her North American tour on Instagram which embarked in Atlanta on November 28, and concluded in Vancouver on December 22.

On April 9, 2024, Baek announced her departure and termination of Blue Vinyl, her self-founded independent label, due to her expired contract alongside The Volunteers bandmates.

[45] Baek has cited Beyoncé,[46] Amy Winehouse, Norah Jones, Rachel Yamagata,[47] Oasis, Avril Lavigne, Rage Against the Machine, as well as Korean artists BoA, Light & Salt, and Yoo Jae Ha as her influences.

[49] Baek also revealed through her live performances that she wrote the songs "Amy" and "True Lover" from her debut album dedicated to Winehouse.

[52] On her lyrical inspiration for her second album, Tellusboutyourself, Baek cites the poetic metaphors of Blossom Dearie and the straightforward style of Amy Winehouse as influences.