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2012SRFTP BY2.jpg
By2 at the Taipei Samsung Running Festival in 2012
Background information
Origin Yio Chu Kang, Singapore
Genres Dance-pop, Mandopop
Years active 2008–present
Labels Ocean Butterflies Music
Website Official Blog
Members Miko Bai ()
Yumi Bai ()

By2 is a Singaporean duo based in Taiwan and signed under a 10-year contract with Ocean Butterflies International. The duo is composed of two female twins, Miko Bai and Yumi Bai, they debuted with their first studio album, NC 16.

The duo gained attention at the start of their career with their first two studio albums, "NC 16" and "Twins", but it was not until 2010 when they released their third studio album, "Grown Up" they gained significant popularity, with the album topping Taiwan's music chart, "G-Music" and several music charts in China. The album was responsible for 33 percent sales of albums in the Chinese market and 18 percent sales of albums in Taiwan during the week of 9 April, to 15 April 2010.[1]

Personal life[edit]

Their duo band was named "BY2" after their surname "Bai" and that they are twin sisters. Their father died of cancer in 2007 when Miko and Yumi were 15 years old.[2] Their father had hoped that Miko and Yumi will not give up on their dreams under any circumstances, thus encouraging them to actively pursue their aspiration of becoming singers.

These sisters have been given different hairstyles for easy identification due to their uncanny resemblance. However, they claimed to be different in terms of personality. Miko, Bai Wei-Fen has been described as more introverted and quiet while her sister, Yumi, Bai Wei-Ling, has been described as a more extroverted and outgoing person.

They moved to Taiwan in 2007 to further their career.[3]

Yumi was in a relationship with Mario Ho (何猷君) in November 2014. However, they broke up later in February.



From a young age, both sisters have been exposed to performing arts and have learned the violin, piano, ballet and many other styles of dancing. As they reached adolescence, their passion for performing grew and they picked up more performing skills. They joined the Chinese Folk Dance in their secondary school, Yio Chu Kang Secondary School, as part of their co-curricular activity.

At the age of 13, both of them joined the Ocean Butterflies' Music Forest's V Singer ("非常歌手") training course. The course aims to teach aspiring singers how to perform on stage and techniques in singing and dancing.[4] They graduated from the course clinching a "Best Costume Design" award. Billy Koh of Ocean Butterflies Music noticed their talent and gave them a 10-year record deal.[5] They were sent to other countries such as Japan, China and Taiwan to gain exposure to different forms of dance styles, as well as to enhance vocal training and stage presence.[4]

2008 to 2009: Debut with NC16 and Twins[edit]

Autograph session with By2 at the Tainan South Park 2009.

On 25 July 2008, By2 released their debut studio album, NC16, consisting of 11 songs in total, with composers under their label composing the songs for the album. On 10 April 2009, the duo released their second studio album, Twins, with a total of 11 songs. This is the first album featuring a track written by the duo, titled "Don't Go Away", which was used as the opening theme for the Taiwanese airing of the Korean TV series, East of Eden. The song was also released in an English version.

2010 to 2011: Grown Up, Love Always and 90' Now[edit]

On 9 April 2010, By2 released their third studio album, Grown Up. The album, was a commercial success, topping several album charts in mainland China and taking first place on Taiwan's G-Music. During the week of 9 to 15 April, the album was responsible for 33 percent of sales in the Mandarin language album market. The duo also went into writing, publishing their first book "Love Always" in 2011 with an Asia-wide release.[6][7][8] The first edition was sold out in Taiwan within a week after the release date.

On 19 October 2011, the duo released their fourth studio album, 90' Now.

2012 to present: 2020 Love You Love You and Paradise[edit]

On 3 August 2012, By2 released their first EP, 2020 Love You Love You, with a total of 4 tracks including the 2 promotional tracks, "2020 Love You Love You" and "You Don't Know Me". When Love Walked In (爱情闯进门) from the EP was featured as the opening theme of Chinese-Taiwanese drama of the same name, When Love Walked In, which stars Victoria Song, Calvin Chen and Zhou Mi.[2]

In September 2012, the duo represented Singapore in Chinese reality singing talent show, Asian Wave (声动亚洲).[9]

On 18 September 2013, the duo released their fifth studio album, Paradise. It peaked at number 6 on Taiwan's G-Music chart during the week of release from 14 to 20 September.[10] They held various meet and greet sessions around Taiwan and China and also performed on various Taiwanese variety shows to promote the album and its two promotional singles, "No Reason" (沒理由) and "No More Tears" (不哭了).[11]


Stage name English name Chinese name Date of birth[12]
Romanized Hanzi
Miko Peh Wei-fen Bai Wei-fen 白緯芬 23 March 1992 (Older sister)
Yumi Peh Wei-ling Bai Wei-ling 白緯玲 23 March 1992 (Younger sister)


Main article: By2 discography
Studio albums

Extended plays
Compilation albums
  • By2 Twins Collection


  1. ^ "G榜第15周:By2青春无极限 《成人礼》空降冠军" (in Chinese). 腾讯网. 19 April 2010. Retrieved 20 August 2014. 
  2. ^ a b "So close, so hot". AsiaOne. 30 September 2012. 
  3. ^ Lee, Jocelyn (27 July 2009). BY2 lonely in Taiwan, The Straits Times. Retrieved on 18 August 2009.
  4. ^ a b "Observers stunned by local Mandopop duo By2's unaffected bust size after body fat loss". Lollipop SG. 25 September 2013. Retrieved 23 February 2015. 
  5. ^ Chang May Choon (12 March 2008). "Pursuing our dreams was late dad's wish", AsiaOne. Retrieved on 18 August 2009.
  6. ^ 一樣愛著你 By2的愛心日記
  7. ^ "一樣愛著你 By2的愛心日記". Kinokuniya. 
  8. ^ "By2 reveal that they crave for love". XinMSN. Retrieved 20 August 2014. 
  9. ^ "《声动亚洲》亚洲赛厮杀 BY2被批表情单一" (in Chinese). 19 September 2012. Retrieved 23 February 2015. 
  10. ^ "G-Music 風雲榜 (華語榜)" (in Chinese). G-Music. 20 September 2013. 
  11. ^ "BY2 flaunts hot bodies with ultra-sexy skirts at signing event". xinmsn. Retrieved 21 August 2014. 
  12. ^ "By2". JPop Asia. 

External links[edit]