2013–2017: Career beginnings and debut with I.O.I Beginning in her fourth year of elementary school, Jeon auditioned at various entertainment companies in South Korea. That same year, she sang and made an appearance in a music video for English education. In August 2014, Jeon, her mother and her grandmother briefly made an appearance on
KBS2's
Hello Counselor among the studio audience. She was also cast in a cameo role alongside her sister in the 2014 film
Ode to My Father by director
Yoon Je-kyoon, who her father was acquainted with and needed two biracial children for his film. That same year, Jeon auditioned for
JYP Entertainment with "
Lonely" by
2NE1 and was accepted into the agency's trainee program. In 2015, she appeared in label-mate
Got7's "
Stop Stop It" music video alongside other female trainees. In May 2015, Jeon participated in
Mnet reality survival program
Sixteen, where she was pitted against fifteen other trainees from the agency to secure a spot in its first girl group in five years (now
Twice) after the debut of
Miss A; however, Jeon was eliminated in the final round and continued as a trainee. JYP Entertainment founder
Park Jin-young stated she had star quality but lacked preparation. In January 2016, as a representative of her label, Jeon participated in the competition series
Produce 101 and finished in first place with 858,333 votes. After completing a two-and-a-half-year training period, fifteen-year-old Jeon officially debuted on May 4 with the project female group
I.O.I and its first
extended play Chrysalis under
YMC Entertainment. On August 9, Jeon was included in a sub-unit of I.O.I consisting of six other members. The sub-unit released the single "
Whatta Man", which debuted at number two on the
Gaon Digital Chart. Jeon and her band-mates received their first-ever music show win with the single on
SBS MTV's
The Show. On August 29, Jeon collaborated with I.O.I band-mates
Choi Yoo-jung and
Chungha and
Ki Hui-hyeon of
DIA on the digital single "
Flower, Wind and You". It entered the Gaon Digital Chart at number 48. In October, Jeon was selected as the new host for
The Show, paired with singer
Wooshin of
UP10TION. On January 9, 2017, it was confirmed that Jeon signed a formal contract with JYP Entertainment for her solo activities on television. The agency however, revealed they had yet to decide what path her future held. Jeon's activities with I.O.I soon ended following its disbandment on January 29, 2017. Shortly afterward, she joined the second installation of ''
Sister's Slam Dunk as a regular cast member. On March 9, Eric Nam and Jeon released a collaborative digital single titled "You, Who?". The single charted at number 16 on the Gaon Digital Chart. On May 12, Jeon joined Unnies, a project group created by the production team of Sister's Slam Dunk 2
. The group released the singles "Right?" and "Lalala Song". Upon release, the digital singles debuted at numbers two and 48, respectively, on the Gaon Digital Chart and numbers 10 and 22, respectively, on the Billboard''
World Digital Song Sales chart. "Right?" sold over 950,000 digital copies by the year's end. On March 28, 2017, Jeon joined the
KBS web entertainment program
Idol Drama Operation Team. On the show, she and six other girl group members worked together to write their own drama series, ''Let's Only Walk the Flower Road'', becoming accredited scriptwriters as well as acting in the series as fictional versions of themselves in a girl group. Final filming for the show took place on May 9. The seven cast members formed a project girl group called Girls Next Door and released a single as part of the show's soundtrack. The song, "Deep Blue Eyes", was co-written and co-composed by
B1A4's
Jinyoung and made available on June 14 through
Warner Music Korea. The group held their debut stage on July 14 at
Music Bank. In November 2017, Jeon featured on the digital single "Nov to Feb" by label-mate senior
Jun. K of
2PM and performed the song in the special broadcast
Jun.K X Rooftop Live on
V Live.
2018–present: Solo debut and mainstream success On August 20, 2018, Jeon departed JYP Entertainment, terminating her contract with the agency following a formal discussion and mutual agreement. The following month, she signed an exclusive contract with
YG Entertainment's independent subsidiary label
The Black Label, home to South Korean
R&B singer
Zion.T. Jeon revealed she joined the label soon after her meeting with CEO
Teddy Park, citing his authenticity and feeling of content while imagining future plans for her as reasons. On February 25, 2019, The Black Label revealed Jeon was preparing to make her debut as a solo artist with a lead single produced by Teddy. Her debut single "
Birthday" was released on June 13 with an accompanying music video that surpassed four million views in 24 hours on
YouTube. 18-year-old Jeon made her broadcast debut as a soloist on
Show! Music Core, performing both "Birthday" and its
B-side "Outta My Head" on June 15. The singles entered the
Billboard World Digital Songs Chart at numbers five and nine, respectively, while "
Birthday" peaked at numbers 22 and 18 on the
Gaon Digital Chart and
Billboard Korea K-pop 100, respectively. The lead single was also used in the trailer for
Nora From Queens starring
Awkwafina. On March 28, 2020, the reality series
I Am Somi, was released on The Black Label's
YouTube channel, a vlogging series on Jeon's life. In the sixth episode, Jeon revealed that her next release had been delayed and the series cut short due to travelling restrictions related to the
coronavirus pandemic. On July 14, it was confirmed that Jeon would make her comeback on July 22 with a new single titled "
What You Waiting For". On July 20, in conjunction with the release of "What You Waiting For", Jeon signed with
Interscope Records and
Universal Music Group for representation outside of
Asia. On March 1, 2021, Jeon was invited by
The Blue House to commemorate the 102nd anniversary of the
Korean Declaration of Independence. The ceremony was held at
Tapgol Park in
Jongno District,
Seoul and attended by
President of South Korea,
Moon Jae-in. She recited a reading from the March 1 Declaration of Independence alongside foreign activist descendants, entirely in the Korean language. The Blue House revealed they selected Jeon as a multicultural representative for her popularity as an idol promoting Korean content worldwide. Jeon and most members of I.O.I reunited on their fifth debut anniversary with the livestream special
Yes, I Love It! on May 4; only members
Kyulkyung and
Mina were absent. On July 23, Jeon was revealed to release a new single, "
Dumb Dumb", on August 2. Its music video garnered 10 million views in under 24 hours on YouTube and 20 million views in two days, both personal records. The release peaked at numbers eight and nine on the
Gaon Digital Chart and the
Billboard Korea K-pop 100 respectively, marking her first top ten single as a soloist. "Dumb Dumb" also became her first chart entry in the
Billboard Global Excl. U.S., debuting at number 130. On October 14, 2021, The Black Label confirmed that Jeon would release her first full-length album,
XOXO, and its
lead single of the same name on October 29. The digitally-released singles "Birthday", "Outta My Head", "What You Waiting For" and "Dumb Dumb" were among the tracks on the album. The album went on to debut at number six on the
Gaon Album Chart and sold 55,223 copies in the month of November. Lead single "XOXO" peaked at number 43 on the Gaon Digital Chart and became her first chart entry in the
Billboard Global 200 at number 185. On July 24, 2023, Jeon announced that she would be releasing a new
extended play album
Game Plan in August. The EP was released August 7, with the lead single "
Fast Forward". The song was a commercial and critical success, peaking at number 5 on South Korea's Circle Digital Chart, and being named as one of the best K-pop songs of 2023 by
Dazed and
Business Insider. On December 12, 2023, Jeon released the special Christmas single "Ex-Mas" in collaboration with rapper
Big Naughty. On August 2, 2024, Jeon released the summer special single "Ice Cream". On July 7, 2025, Jeon released the single "Extra". On July 21, The Black Label announced Jeon would release her second EP,
Chaotic and Confused on August 11, 2025, with the track list revealed on July 30. ==Personal life==