Ok Taec-yeon, composing as Taecyeon a.k.a TY, is a South Korean actor, entrepreneur, singer, songwriter and the main rapper of the South Korean boy group 2PM.
 In 2012, Taecyeon teamed up with his fellow Dankook University alumni students to produce a digital album and then began writing and composing songs for his solo stage at 2PM Japanese Concert, 'Six Beautiful Days' in Budokan.
 Taecyeon started actively participating in writing and composing songs for 2PM the following year.
Lee Jun-ho (; born January 25, 1990), simply known as Junho, is a South Korean singer-songwriter, dancer and actor.
 He is a member of the South Korean boy band 2PM.
Republic of 2PM is the first Japanese studio album (third album overall) by South Korean boy band 2PM.
 It was released in November 30, 2011 in three editions: 2 CD+DVD and a Regular edition.
Galaxy of 2PM is the fifth Japanese studio album by South Korean boy band 2PM.
 It was released on April 27, 2016 in five editions:
2PM (Hangul: 투피엠 ) is a South Korean boy band formed by JYP Entertainment.
 The current members are Jun.
 K (formerly known as Junsu), Nichkhun, Taecyeon, Wooyoung, Junho and Chansung.
 Former leader Jay Park officially left the group in early 2010.
2PM Member's Selection is the third compilation album by South Korean boy band 2PM.
 It was released on May 21, 2012.
"One Day" is a song by the South Korean boy groups 2AM and 2PM, Oneday.
 It was released in July 4, 2012 as 2AM's third Japanese single and 2PM's fifth Japanese single.
 The song is the main theme song for the documentary movie "Beyond the Oneday ~Story of 2PM & 2AM~", which broadcast in Japan started on June 30.
Jang Woo-young (Hangul: 장우영; Hanja: 張祐榮; born on April 30, 1989), generally known as Wooyoung, is a South Korean singer, songwriter and actor.
 He is currently based in South Korea as a member of 2PM, a six-member boy band managed by JYP Entertainment.
 He is mainly known for his work in 2PM and his role as Jason in the South Korean drama "Dream High".
 In 2009, he began to study broadcasting at Howon University.
01:59PM is the first studio album by South Korean boy band, 2PM.
 The album was released in digital and physical format by November 10, 2009.
 This would be the last 2PM album in which Jay Park would sing, although his face was excluded from the cover following his departure from the band.
2PM of 2PM is the fourth Japanese studio album by South Korean boy band 2PM.
 It was released in April 15, 2015, as their second album release under Sony Music Japan sublabel Epic Records Japan in three editions:

Question: When was the  South Korean singer-songwriter  who is a member of , 2PM born 
Answer: January 25, 1990