Lee Ji-eun (이지은; born 16 May 1993), better known by her stage name IU (아이유), is an award-winning South Korean singer-songwriter and actress signed to FAVE Entertainment. She debuted in 2008 to much acclaim for her vocal ability but did not find mainstream success until 2010 with 잔소리 which became her first number one hit. As of 2017, IU has fourteen official #1 singles on Gaon, Korea's national chart, and four #1 singles on Billboard's K-Pop Hot 100. She also charted in the top ten of Gaon's annual singles chart for two consecutive years from 2010-2011. On top of her commercial success, her music and artistry are also critically acclaimed winning multiple Daesang awards for Song of the Year (for 좋은 날) and Artist of the Year from 2011-2012.

2008: Debut
IU debuted on a Korean music program called M! Countdown in September 18, 2008. On September 23, 2008, she released her first mini-album, Lost and Found, in which the most famous song was the title track, "Missing Child." However, the album was not commercially successful. It wasn't until her follow-up album that she succeeded in breaking into the mainstream.

On April 16, 2009, IU launched her first full album, titled Growing Up, with the lead promotional number "Boo." Within three weeks, "Boo" went up to the #1 contenders for SBS Inkigayo, and her name also went up twice on Take 7 together with other notable artists like SG Wannabe and Younha. The song also did well on KBS Music Bank K-Chart, on Mnet M!Countdown chart, and on various online music charts.

In 2009, IU sang the ending title song, "Araro", for the acclaimed MBC drama Queen Seon Duk, where she was recommended by the director, Sam Kim, citing her "clear tone and her lyrical sensibility." She was also featured on Mighty Mouth's album Love Class in the song "희망사항." In late 2009, IU recorded MC Mong's song "Love Letter For You (Neoyege Sseuneun Pyeonji)," featuring SHINee's Key as a rapper in the song.

IU recorded the song "잔소리" (Nagging / Scolded) with 2AM's Seulong for the TV show We Got Married. On June 27, 2010, IU won her first award since her debut on SBS Inkigayo for "Nagging." On July 2, 2010, she won another award for that song on KBS Music Bank K-Chart. Soon after, IU was chosen to sing the main OST song for the MBC drama Road No.1 titled "여자라서" (Because I'm A Woman). IU's other collaborations include duets with Yoo Seung Ho ("사랑을 믿어요" (Believe in Love)), Sung Shi Kyung ("그대네요" (It's You)), and Big Bang's Seungri ("I Know").

IU worked with some of South Korea's most famous musicians and producers for her third mini-album, REAL, released in December 2010. Lee Min Soo and Kim Eana, the creators of IU's previous hit "Nagging", helped produce her award-winning song "좋은 날" ("Good Day"). IU received three SBS Inkigayo Mutizen awards for her performances of the song (on December 18 and December 26, 2010, and January 2, 2011), three awards from KBS Music Bank K-Chart (on December 24 and December 31, 2010, and January 7, 2011), and one award from Mnet M!Countdown on December 23, 2010.

IU often covers other pop artists' songs with her guitar and features her friend Thunder from MBLAQ, most notably renditions of SHINee's "Juliette," Big Bang's "Lies," Super Junior's "Sorry, Sorry" and Girls' Generation's "Gee."

Soribada, an online music service, combined the music downloads and streams from January 1 to March 30, 2011, to name IU's song, "Good Day" as the number one song of the first quarter. Her song "Someday" from the KBS Drama Dream High OST and her ballad "The Story Only I Didn't Know" placed 4th and 7th place, respectively – showing that IU got 3 of the top 10 digital spots for the first quarter. Her first original composition, "Dreaming" was used in the drama "Dream High", but not released officially.

On June 18, 2011, IU held her first official fanmeeting and mini-concert at AX-Korea. It also marked the 1004th day since she debuted.

IU also sang a self-composed OST called "Hold my Hand" for drama series The Greatest Love.
On November 29, 2011, IU's second full length album Last Fantasy was released and achieved an ‘all-kill’ as all 13 songs immediately swept most of all the charts. The track list was revealed on November 22, 2011.

On January 24, 2012, IU held a live showcase at Tokyo's Bunkamura Orchard Hall. On March 1st, 2012, she released a promotional video for the Japanese version of "Good Day", the title track of her Japanese single album. The album, which includes DVD footage from the showcase, was later released on March 21, 2012.

In early April, 2012, it was announced that IU will be holding her first solo tour, "Real Fantasy", starting in June. The tour features performances in six different cities across South Korea, including Seoul and Busan.

IU released the single album, "Spring of a Twenty Year Old" ("스무 살의 봄"), on May 11th, 2012.[16] The album contains three songs, one of which is self-composed by IU. This song, entitled "Peach" ("복숭아"), was digitally released before the album, on May 4th, 2012. A 26-minute-long documentary-style music video film was released alongside the album, featuring several interviews with IU that showcase her personal thoughts and experiences. This film contains footage of IU as she visits Venice, Italy.

Song lyric (Bonus Track) Voice Mail (Korean Ver.) (BONUS TRACK) VOICE MAIL (KOREAN VER.) IU
Song lyric A Gloomy Clock (feat.Jong-hyun of SHINee) A GLOOMY CLOCK (FEAT.JONG-HYUN OF SHINEE) IU
Song lyric A dreamer A DREAMER IU
Song lyric Autumn Morning AUTUMN MORNING IU
Song lyric Bad Day BAD DAY IU
Song lyric Bbibbi BBIBBI IU
Song lyric Beautiful Dancer BEAUTIFUL DANCER IU
Song lyric Between the lips (50cm) BETWEEN THE LIPS (50CM) IU
Song lyric Black Out BLACK OUT IU
Song lyric Blueming BLUEMING IU
Song lyric Boo BOO IU
Song lyric Can't Love You Anymore (With OHHYUK) CAN'T LOVE YOU ANYMORE (WITH OHHYUK) IU
Song lyric Crayon CRAYON IU
Song lyric Danny Boy DANNY BOY IU
Song lyric Dear Name DEAR NAME IU
Song lyric Ending Scene ENDING SCENE IU
Song lyric Every End of the Day EVERY END OF THE DAY IU
Song lyric Everybody Has Secrets EVERYBODY HAS SECRETS IU
Song lyric Feel so good FEEL SO GOOD IU
Song lyric Fifth Finger (다섯째 손가락) FIFTH FINGER (다섯째 손가락) IU
Song lyric Friday FRIDAY IU
Song lyric Friday (feat.Jang Yi-jeong of HISTORY) FRIDAY (FEAT.JANG YI-JEONG OF HISTORY) IU
Song lyric Give You My Heart GIVE YOU MY HEART IU
Song lyric Glasses GLASSES IU
Song lyric Good Day GOOD DAY IU
Song lyric Havana HAVANA IU
Song lyric Hold my hand HOLD MY HAND IU
Song lyric Ice Flower ICE FLOWER IU & 김연아
Song lyric Into the I-Land INTO THE I-LAND IU
Song lyric Jam Jam JAM JAM IU
Song lyric Knees KNEES IU
Song lyric Last Night Story LAST NIGHT STORY IU
Song lyric Love Alone LOVE ALONE IU
Song lyric Love Poem LOVE POEM IU
Song lyric Love attack LOVE ATTACK IU
Song lyric Love of B LOVE OF B IU
Song lyric Love poem LOVE POEM IU
Song lyric Lullaby LULLABY IU
Song lyric Modern Times MODERN TIMES IU
Song lyric Monday Afternoon MONDAY AFTERNOON IU
Song lyric My Old Story MY OLD STORY IU
Song lyric New World NEW WORLD IU
Song lyric Not like this NOT LIKE THIS IU
Song lyric Obliviate OBLIVIATE IU
Song lyric Only I Didn't Know ONLY I DIDN'T KNOW IU
Song lyric Palette PALETTE IU
Song lyric Peach PEACH IU
Song lyric Rain Drop RAIN DROP IU
Song lyric Red Queen RED QUEEN IU
Song lyric Secret Garden SECRET GARDEN IU
Song lyric Shoes SHOES IU
Song lyric Someday SOMEDAY IU
Song lyric The Age Of The Cathederals THE AGE OF THE CATHEDERALS IU
Song lyric The Night of the First Breakup THE NIGHT OF THE FIRST BREAKUP IU
Song lyric The Red Shoes THE RED SHOES IU
Song lyric The Visitor THE VISITOR IU
Song lyric The shower THE SHOWER IU
Song lyric Through the Night THROUGH THE NIGHT IU
Song lyric Titanic TITANIC IU
Song lyric Twenty-three TWENTY-THREE IU
Song lyric Unlucky UNLUCKY IU
Song lyric Voice-mail VOICE-MAIL IU
Song lyric Wait WAIT IU
Song lyric What I'm Doing Slow WHAT I'M DOING SLOW IU
Song lyric When Love Passes By WHEN LOVE PASSES BY IU
Song lyric You and I YOU AND I IU
Song lyric Zezé ZEZÉ IU
Song lyric above the time ABOVE THE TIME IU
Song lyric dlwlrma DLWLRMA IU
Song lyric eight (feat. SUGA) EIGHT (FEAT. SUGA) IU
Song lyric lost child LOST CHILD IU
Song lyric marshmallow MARSHMALLOW IU
Song lyric 一天结束 一天结束 IU
Song lyric 少年時代 少年時代 IU
Song lyric 良い日 (좋은날) 良い日 (좋은날) IU
Song lyric 개여울 [Gaeyeoul] : By the stream 개여울 [GAEYEOUL] : BY THE STREAM IU
Song lyric 그 애 참 싫다 그 애 참 싫다 IU
Song lyric 금요일에 만나요 금요일에 만나요 IU
Song lyric 기다려 기다려 IU
Song lyric 꽃 (Kkot) : Flower 꽃 (KKOT) : FLOWER IU
Song lyric 꿍따리 샤바라 (Kkungttari-Shabara) : Boom Ladi Dadi 꿍따리 샤바라 (KKUNGTTARI-SHABARA) : BOOM LADI DADI IU
Song lyric 나의 옛날이야기 나의 옛날이야기 IU
Song lyric 나의 옛날이야기 My Old Story 나의 옛날이야기 MY OLD STORY IU
Song lyric 너랑 나 You & I 너랑 나 YOU & I IU
Song lyric 너의 의미 (Neoui uimi) : Meaning of you 너의 의미 (NEOUI UIMI) : MEANING OF YOU IU
Song lyric 너의 의미 Meaning of You 너의 의미 MEANING OF YOU IU
Song lyric 느리게 하는 일 느리게 하는 일 IU
Song lyric 매일 그대와 [Maeil Geudaewa] : Everyday with you 매일 그대와 [MAEIL GEUDAEWA] : EVERYDAY WITH YOU IU
Song lyric 미리 메리 크리스마스 미리 메리 크리스마스 IU
Song lyric 미아 미아 IU
Song lyric 밤편지 Through the Night 밤편지 THROUGH THE NIGHT IU
Song lyric 복숭아 복숭아 IU
Song lyric 복숭아 (Peach) 복숭아 (PEACH) IU
Song lyric 분홍신 분홍신 IU
Song lyric 비밀의 화원 [Bimilui Hwawon] : Secret Garden 비밀의 화원 [BIMILUI HWAWON] : SECRET GARDEN IU
Song lyric 삐에로는 우릴 보고 웃지 삐에로는 우릴 보고 웃지 IU
Song lyric 사랑니 Wisdom Tooth 사랑니 WISDOM TOOTH IU
Song lyric 사랑이 지나가면 사랑이 지나가면 IU
Song lyric 아이야 나랑 걷자 아이야 나랑 걷자 IU
Song lyric 아침 눈물 Tear Drops in the Morning 아침 눈물 TEAR DROPS IN THE MORNING IU
Song lyric 여름밤의 꿈 여름밤의 꿈 IU
Song lyric 우울시계 우울시계 IU
Song lyric 이 지금 Dlwlrma 이 지금 DLWLRMA IU
Song lyric 이런 엔딩 Ending Scene 이런 엔딩 ENDING SCENE IU
Song lyric 이름에게 Dear Name 이름에게 DEAR NAME IU
Song lyric 있잖아 있잖아 IU
Song lyric 잔소리 잔소리 IU
Song lyric 잔혹동화 (Scary Fairy Tale) 잔혹동화 (SCARY FAIRY TALE) IU
Song lyric 잠 못 드는 밤 비는 내리고 [Jam Mot Deuneun Bam Bineun Naeligo] : Sleepless rainy night 잠 못 드는 밤 비는 내리고 [JAM MOT DEUNEUN BAM BINEUN NAELIGO] : SLEEPLESS RAINY NIGHT IU
Song lyric 잼잼 Jam Jam 잼잼 JAM JAM IU
Song lyric 좋은 날 좋은 날 IU
Song lyric 팔레트 Palette 팔레트 PALETTE IU
Song lyric 푸르던 푸르던 아이유 (IU)
Song lyric 하루 끝 하루 끝 IU
Song lyric 혼자 있는 방 혼자 있는 방 IU