Hyolyn auditioned for JYPE two times and was finally accepted on her second try after placing 1st place at the audition. She was set to debut in a project group with Secret's Jieun, EXID's Hani, and Bestie's Uji, but plans for the debut were cancelled. Hyolyn then left JYPE and joined Starship Entertainment, auditioning with a cover of Christina Aguilera's Hurt.
In 2012, Hyolyn starred in the KBS drama Dream High Season 2 as Nana, a famous idol from the fictional girl group HershE. Hyolyn was teamed up with Ailee and Jiyeon for the song "Superstar" for this drama.
Solo debut, collaborations, single I Am A Singer 3 and Unpretty Rapstar 2
On November 22, 2013, Hyolyn shared the stage with Stevie Wonder for a special performance of "I Just Called to Say I Love You" at the 2013 Mnet Asian Music Awards, South Korea's biggest music award show.
Hyolyn made her solo debut on November 26, 2013 with the album Love & Hate. The album consists of double title tracks "Lonely" and "One Way Love" with tracks from producers such as Brave Brothers and Kim Do Hoon. This album also features Korean rappers such as Mad Clown, Block B's Zico, Dok2 and Geeks' Lil' Boy.
On December 31, 2013 Hyolyn's music video for the Korean version of "Let It Go" for Disney's animation movie Frozen was revealed and she became the second Korean singer to participate in a Disney production following Park Jung Hyun who previously sang for Disney's "Reflection" for Mulan.
On March 28, 2014 Starship Entertainment announced on their Twitter account that Hyolyn would feature in Mad Clown's comeback track, "Without You". The music video for "Without You" was released on April 3, 2014. Hyolyn also participated in rapper MC Mong in his comeback to the Korean scene after 5 years with the album Miss Me or Diss Me that was released on November 3. On November 20, Hyolyn collaborated with singer-songwriter and fellow Starship Entertainment artist Jooyoung on a project titled "Hyolyn x Jooyoung".
Hyolyn was the first idol group singer to participate in the Chuseok special of the singing show I Am a Singer that aired on September 9. The special episode had performances by veteran singers such as The One, Sinawe, Park Ki Young, Kim Jong Seo and Yoon Min Soo. Hyolyn gave two performances and was ranked second place overall in the competition. Multiple broadcast insiders revealed on January 13 that Hyolyn agreed to join the lineup of MBC's I Am a Singer season 3 launch and her agency Starship Entertainment told OSEN that Hyolyn would start filming on the 21st as the first idol singer on the show.
On April 2, 2015 Hyolyn teamed up with her groupmate Soyou to cover K.Will's latest track "Growing" as Starship Entertainment's cover project. , On May 21, 2015 Hyolyn released an OST for the drama Warm and Cozy called "Closer." .
On August 17, 2015, it was confirmed that Hyolyn will join Unpretty Rapstar season 2. On August 26, Hyolyn teamed up with Zico and Paloalto for collaboration song 'Dark Panda'.
On September 7, 2015, Hyolyn released a free single, 'The Wall Destroyer' featuring Eluphant's Keebee.
Hyolyn released her Unpretty Rapstar's Semi Finals track 'My Love' featuring Basick on November 6, 2015. At the end of the show, Hyolyn was placed third.
On December 9, 2015, it was reported that Hyolyn, Jooyoung, and Bumkey will be collaborating with producing team, Da Internz, for a new song. On December 14, the music video teaser for their collaboration song "Love Line" was released. On December 18, the music video for "Love Line" was released.
- Love & Hate (2013)
|2013||Sistar||"Crying"||Give It to Me||Co-Lyricist|
|2014||"Sunshine"||Touch N Move|
|2015||Unpretty Rapstar||"Don't Stop"||Unpretty Rapstar 2 Track 1|
|Hyolyn (feat. Jay Park & Geegooin)||"It's Not Time to Love (Money)"||Unpretty Rapstar 2 Track 5|
|Hyolyn (feat. Basick)||"My Love"||Unpretty Rapstar 2 Semi Final, Pt. 1|
|2016||Sistar||"Say I Love U"||Insane Love||Lyricist, Composer, Co-Arranger|
|2012||Dream High Season 2||KBS2||Nana|
|2011||Immortal Songs 2||KBS2||Episodes 1–15, 25|
|2012||"King of Kings" Special||Episodes 71 & 72|
|Running Man||SBS||Episode 75|
|Weekly Idol||MBC Every 1||With Haha and Soyou||Episode 45|
|2013||Shinhwa Broadcast||JTBC||Episodes 45 & 46|
|Running Man||SBS||With Dasom||Episode 162|
|Hello Counselor||KBS2||Episode 150|
|Weekly Idol||MBC Every 1||With Bora||Episode 83|
|2014||Immortal Songs 2||KBS2||Rival Special|
|Michael Bolton Special|
|I Am a Singer||MBC||Chuseok Special|
|2015||SISTAR Showtime||MBC Every 1||Episodes 1–8|
|I Am a Singer||MBC||Contestant, Season 3|
|I Live Alone||Episode 89|
|Yaman TV||Mnet||Guest with Soyou & Monsta X|
|Unpretty Rapstar 2||Contestant|
|Hello Counselor||KBS World||Guest along with Sistar||Episode 230|
|Infinite Challenge||MBC||Guest||Episodes 440 & 442|
|2016||King of Mask Singer||Contestant||Episodes 49 & 50|
|Duet Song Festival||Episode 11|
|Talents for Sale||KBS||Guest along with Sistar||Episodes 7 & 8|
|Knowing Bros||JTBC||Guest along with Sistar||Episode 32|
|Running Man||SBS||Guest along with Sistar||Episode 307|
Awards and nominations
|2012||5th Korea Drama Awards||Best New Actress||Dream High 2||Nominated|
|2014||World Music Awards||World's Best Song||"Goodbye"||Nominated|
|"One Way Love"||Nominated|
|World's Best Video||Nominated|
|World's Best Female Artist||N/A||Nominated|
|World's Best Live Act||N/A||Nominated|
|World's Best Entertainer of the Year||N/A||Nominated|
|9th Seoul International Drama Awards||Outstanding Korean Drama OST||"Crazy of You"||Nominated|
|7th Korea Drama Awards||Best OST||Nominated|
|16th Seoul International Youth Film Festival||Best OST by a Female Artist||Nominated|
|16th Mnet Asian Music Awards||Best Female Artist||N/A||Nominated|
|Best Dance Performance - Solo||"One Way Love"||Nominated|
|UnionPay Song of the Year||Nominated|
|UnionPay Artist of the Year||N/A||Nominated|
Music program awards
|2013||December 12||"One Way Love"|
|2014||April 16||"Without You" (With Mad Clown)|
|2013||December 13||"One Way Love"|
MBC Music Show Champion
|2013||December 4||One Way Love|
Show! Music Core
|2013||December 7||"One Way Love"|
|2014||November 25||"Erase" (With Jooyoung)|