As One () was a South Korean R&B duo consisting of Korean-American singers Lee Min and Crystal. The group debuted in 1999 with the album Day by Day, and released five more albums before announcing their hiatus from the music industry in 2017 with the single, "Goodbye for Now". The group officially reunited in 2019, and continued to release music until member Lee Min's death in 2025.
Career
Their first hit was the song "너만은 모르길" (Only You Wouldn't Know), released in 1999 by Rock Records. Between their fourth and fifth albums, their contract with Rock Records expired and they signed with EMI Music Publishing Korea; a label which also manages other K-pop stars like DJ DOC and Baby V.O.X.
In late 2006, As One released their fifth album 12 Tears of Farewell, and started their promotional activities with the lead track "십이야" (12 Nights).
In contrast to their usual style, As One released a 19+ rated music video ahead of their October 29, 2014 release date for the single "오늘같은 날" (For the Night). The music video featured labelmate Jae Woong from 4-member hip hop group Troy and fitness model Kim Hae Na.
On June 20, 2016, As One made a comeback with a new single titled "The Pain I Caused". The song is from their sixth album Outlast, which was released on June 21, 2016. The album features ten tracks along with the lead single, "Don't Say Anything", which was released June 21, 2016. The pair appeared on JTBC's Sugarman 3 on December 13, 2019.
On August 5, 2025, the duo's management agency Brand New Music confirmed that Lee Min died at age 46 in Seoul, South Korea, thereby ending the group activities.
Discography
Studio albums
{| class="wikitable plainrowheaders" style="text-align:center"
! scope="col" rowspan="2" style="width:20em" | Title
! scope="col" rowspan="2" | Album details
! scope="col" colspan="1" style="width:5em" | Peak chart positions
! scope="col" rowspan="2" | Sales
|-
! <br />
|-
! scope="row" | Day By Day
|
- Released: November 23, 1999
- Label: Rock Records
- Formats: CD, cassette
| 27
|
- KOR: 92,843
|-
! scope="row" | You're Welcome ()
|
- Released: August 16, 2001
- Label: Rock Records
- Formats: CD, cassette
| 7
|
- KOR: 131,461
|-
! scope="row" | Carolling (Christmas album)
|
- Released: November 28, 2002
- Label: Rock Records
- Formats: CD, cassette
| 31
|
- KOR: 14,645
|-
! scope="row" | Never Too Far
|
- Released: March 14, 2003
- Label: Rock Records
- Formats: CD, cassette
| 4
|
- KOR: 51,095
|-
! scope="row" | Restoration
|
- Released: November 16, 2004
- Label: DR Music
- Formats: CD, cassette
| 18
|
- KOR: 11,385
|-
! scope="row" | 12 Tears Of Farewell ()
|
- Released: November 17, 2006
- Label: Lutherson Entertainment
- Formats: CD, cassette
| —
|
|-
! scope="row" | Outlast
|
- Released: June 20, 2016
- Label: Brand New Music
- Formats: CD, digital download
| 40
|
|}
Compilation and live albums
{| class="wikitable plainrowheaders" style="text-align:center"
! scope="col" rowspan="2" style="width:20em" | Title
! scope="col" rowspan="2" | Album details
! scope="col" colspan="1" style="width:5em" | Peak chart positions
! scope="col" rowspan="2" | Sales
|-
! <br />
|-
! scope="row" | As One Live
|
- Released: May 23, 2002
- Label: Rock Records
- Formats: CD, cassette
| —
|
|-
! scope="row" | Forever As One
|
- Released: November 19, 2003
- Label: Rock Records
- Formats: CD, cassette
| —
|
|}
Extended plays
{| class="wikitable plainrowheaders" style="text-align:center"
! scope="col" rowspan="2" style="width:20em" | Title
! scope="col" rowspan="2" | Album details
! scope="col" colspan="1" style="width:5em" | Peak chart positions
! scope="col" rowspan="2" | Sales
|-
! <br />
|-
! scope="row" | "For You Not to Know" ()
| 1999
| rowspan="15"
| rowspan="19"
| rowspan="3" | Day By Day
|-
! scope="row" | "Love+" ()
| rowspan="3" | 2000
|-
! scope="row" | "Day By Day"
|-
! scope="row" | "Ring My Bell"
|
|-
! scope="row" | "You're Welcome" ()
| rowspan="2" | 2001
| rowspan="2" | You're Welcome
|-
! scope="row" | "Want and Resent" ()
|-
! scope="row" | "Rockin' Around the Christmas Tree"
| 2002
| Carolling
|-
! scope="row" | "Mr. A-Jo"
| rowspan="2" | 2003
| rowspan="2" | Never Too Far
|-
! scope="row" | "I Hope Not" ()
|-
! scope="row" | "Great Legacy" ()
| 2004
| Restoration
|-
! scope="row" | "Twelve Nights" (十二夜) ()
| rowspan="2" | 2006
| 12 Tears Of Farewell
|-
! scope="row" | "Jingle Bell Rock"
|
|-
! scope="row" | "Zza Zza La"
| rowspan="3" | 2008
| Sponge Remake 2008
|-
! scope="row" | "Kiss Me"
|
|-
! scope="row" | "You Only Love" ()<br />
| You Only Love
|-
! scope="row" | "Sonnet"
| rowspan="2" | 2010
| 37
| rowspan="4"
|-
! scope="row" | "History" ()
| —
|-
! scope="row" | "You Are My Baby"
| rowspan="4" | 2011
| 67
|-
! scope="row" | "Nepa Song" ()
| —
|-
! scope="row" | "Monologue" ()
| 53
|
- KOR: 384,806
| Simply As One
|-
! scope="row" | "The Lie" ()
| 28
|
- KOR: 312,683
| rowspan="3"
|-
! scope="row" | "Only U"<br />
| rowspan="2" | 2012
| 20
|
- KOR: 318,434
|-
! scope="row" | "Day By Day 2012"<br />
| 25
|
- KOR: 181,418<!--116,784 + 64,634-->
|-
! scope="row" | "Awkward Love" ()
| rowspan="3" | 2013
| 37
|
- KOR: 164,783
| rowspan="2" | Simply As One
|-
! scope="row" | "What Are We?" ()<br />
| 15
|
- KOR: 155,797
|-
! scope="row" | "Want and Resent 2013" ()
| 20
|
- KOR: 195,730
| rowspan="2"
|-
! scope="row" | "All Day All Night"<br />
| rowspan="2" | 2014
| —
|
|-
! scope="row" | "For The Night" ()
| 97
|
- KOR: 21,050
| rowspan="5" | Outlast
|-
! scope="row" | "Even For 1 Minute" ()<br />
| 2015
| 16
|
- KOR: 105,469
|-
! scope="row" | "After Rain" ()<br />
| rowspan="4" | 2016
| —
|
- KOR: 18,729
|-
! scope="row" | "Don't Say Anything" ()
| —
|
- KOR: 21,411
|-
! scope="row" | "The Pain I Caused" ()
| 67
|
- KOR: 33,045
|-
! scope="row" | "Something Like Farewell" ()
| —
|
- KOR: 15,925
| rowspan="10"
|-
! scope="row" | "Goodbye for Now" ()
| 2017
| —
| rowspan="9"
|-
! scope="row" | "It's OK Not to Be OK" ()<br />
| 2019
| 194
|-
! scope="row" | "February 29th"
| 2020
| —
|-
! scope="row" | "Something Like a Miracle"
| rowspan="2" | 2023
| —
|-
! scope="row" | "Winter Wonderland"
| —
|-
! scope="row" | "Better"
| 2024
| —
|-
! scope="row" | "Still My Baby"
| rowspan="3" | 2025
| —
|-
! scope="row" | "Happy Birthday to You"
| —
|-
! scope="row" | "Until Always"
| —
|-
| colspan="5" |
|}
Collaborative singles
{| class="wikitable plainrowheaders" style="text-align:center"
! scope="col" rowspan="2" | Title
! scope="col" rowspan="2" | Year
! scope="col" colspan="1" style="width:5em" | Peak chart positions
! scope="col" rowspan="2" | Sales
! scope="col" rowspan="2" | Album
|-
! <br />
| rowspan="2" | Kwak Tae-hun Project 4
|-
! scope="row" | "Love Is Coffee"<br />
| rowspan="3" | 2012
| 55
|
- KOR: 202,827<!--120,782 + 82,045-->
|-
! scope="row" | "Together"<br />
| —
|
|
|-
! scope="row" | "Happy Brand New Year"<br />
| 24
|
- KOR: 292,674
| Brand New Year
|-
! scope="row" | "It's Gonna Be Alright" ()<br />
| 2013
| 19
|
- KOR: 178,871
| rowspan="2"
|-
! scope="row" | "Just Tears" ()<br />
| rowspan="2" | 2014
| 97
|
- KOR: 19,252
|-
! scope="row" | "Brand New Day"<br />
| 30
|
- KOR: 100,723
| Brand New Year Vol. 3
|-
! scope="row" | "A Lonely Christmas" ()<br />
| 2015
| 97
|
- KOR: 25,151
| rowspan="3"
|-
! scope="row" | "Forever Summer" ()<br />
| rowspan="2" | 2016
| —
| rowspan="2"
|-
! scope="row" | "I Wanna Date" ()<br />
| —
|-
| colspan="5" |
|}
Soundtrack appearances
{| class="wikitable plainrowheaders" style="text-align:center"
! scope="col" rowspan="2" | Title
! scope="col" rowspan="2" | Year
! scope="col" colspan="1" style="width:5em" | Peak chart positions
! scope="col" rowspan="2" | Sales
! scope="col" rowspan="2" | Album
|-
! <br />
| The Man in the Mask OST
|-
! scope="row" | "Happy" ()<br />
| 2016
| —
|
| Five Enough OST
|-
| colspan="5" |
|}
Awards and nominations
{| class="wikitable" style="text-align: center; width: 800px"
|-
! scope="col" | Year
! Awards
! scope="col" | Category
! Recipient
! scope="col" | Result
|-
| 2000
| Mnet Km Music Festival
| Best R&B Performance
| "For You Not to Know" ()
|
|-
| 2001
| Mnet Km Music Festival
| rowspan="2" | Best Female Group
| "I'm Fine" ()
|
|-
| 2003
| Mnet Km Music Festival
| "Mr.A-Jo"
|
|}