Lee Hi / Lee Ha Yi was born on September 23, 1996, and is from Bucheon. She attended Sukchun Elementary School and Sangil Middle School. She is currently attending the School of Performing Arts in Seoul. 
Her debut single "1.2.3.4", was released on October 28, 2012 and reached #1 with the first-week sales of 667,549 downloads. She's often called Monster Rookie because she has won many awards despite of her young age and little experience.
Her first full-length album First Love was released in two parts. Part 1 was released on On March 7, 2013 and Part 2 was released on March 28, 2013.

2012-present: K-Pop Star, Debut and First Love
In 2012, Lee Hi finished as the runner-up on Survival K-Pop Star, against Park Ji Min and was eventually signed by YG Entertainment CEO, Yang Hyun-suk.
 
On May 12, 2012, it was announced that Ha Yi will be debuting with a girl group called SuPearls (which originally consisted of Michelle Lee, Ji-min Park, Seung-joo Lee, and Jung-mi Lee) which was originally formed during Survival K-Pop Starand signed to YG. She was set to replace Ji-Min who decided to sign with JYP Entertainment after winning.
 
On October 8, 2012, Ha Yi collaborated with pop group Epik High on their first song in about three years entitled "It's Cold". On October 24, it was announced that Ha Yi will be debuting as a solo artist under the stage name, "Lee Hi", with the single "1.2.3.4". The single was released on October 28. The song was written by Masta Wu and produced by CHOICE37 and Lydia Paek. The music video was directed by director Han Sa Min, who also did 2NE1‘s “Lonely” and Big Bang’s “Blue” and “Monster." The song reached #1 on all the main music charts. The song ranked #1 for three weeks. She also dominated monthly charts. She has ranked on the top spot 11 times on the hourly real time charts, which set a record for female soloists in 2012 She performed "1.2.3.4" on Inkigayo on November 4.
 
Her second single, “Scarecrow”, was released on November 22, 2012.
Following Ha Yi's successful debut as a solo artist, her company made a sudden announcement on February 13, 2013, that her anticipated girl group, Su Pearls, will no longer be continuing as an ensemble and that the other remaining members have been dropped. She will instead continue as a solo artist.
 
On February 24, YG Entertainment released a teaser image for Lee Hi's debut album. On the image it had three dates “March 1st?“, “March 7th?” and “March 21st?“. The next day, YG Entertainment released another teaser image with the words 'mini?', 'single?' and 'album?'. The next day another teaser image was released stated that Lee Hi will be releasing an intro song called 'Turn It Up' on March 1st. On March 2nd, another teaser image with the words 'It's Over' next to an image of Lee Hi holding lipstick. It was revealed that the album, titled "First Love" will be released as a digital only mini-album on March 7th featuring 5 songs, with the full album release on March 28th featuring 10 songs. The title tracks, "It's Over" and "Rose" will be released on these dates respectively.
Lee Hi's full album First Love debuted on 28 March 2013 and her single 'Rose' came in at No. 1 just 1 hour after release. 'Rose' is a the first song released by Lee Hi to feature her not just singing, but rapping as well.

K-pop Star performances

Released Date Track Album
19/03/2012 Don't Stop The MusicSBS K-pop Star Top 8
21/03/2012 For You (너를 위해) SBS K-pop Star SPECIAL No. 1
25/03/2012 Foolish Love (미련한) 사랑 SBS K-pop Star Top 7
28/03/2012 Mercy SBS K-pop Star SPECIAL NO. 2
01/04/2012 Sway SBS K-pop Star Top 6
08/04/2012 Love SBS K-pop Star Top 5
15/04/2012 As Time goes by SBS K-pop Star Top 4
20/04/2012 Good-Bye Baby SBS K-pop Star SPECIAL No. 3
24/04/2012 U Go Girl SBS K-pop Star Top 3
30/04/2012 Killing Me Softly with His Song SBS K-pop Star Top 2
15/05/2012 Rolling in the Deep SBS K-pop Star SPECIAL No. 4

Not Release Tracks
• Bust Your Windows SBS K-pop Star Episode 2
• 인생은 즐거워, rehab SBS K-pop Star Episode 4
• Childish Adult SBS K-pop Star Episode 6
• Mama Do SBS K-pop Star Episode 7
• Love The Way You Lie SBS K-pop Star "Dream Stage"