Januray :) 

Lee Sungmin (Super Junior) – 1 January 1986

Yang Yoseob (BEAST) – 5 January 1990

Nam Jihyun (4Minute) – 9 January 1990

Goo Hara (KARA) – 13 January 199

Kim Junsu (2PM) – 15 January 1988
Kangin (Super Junior) – 17 January 1985
Lee Kiseop (U-KISS) – 17 January 1991
Kang Jiyoung (KARA) – 18 January 1994

Minzy (2NE1) – 18 January 1994
Lee Junho (2PM) – 25 January 1990
Kim Jaejoong (DBSK) – 26 January 1986

February:

Cho Kyuhyun (Super Junior) – 3 February 1988
Ye Jun (F.CUZ) – 4 February 1992
Jung Yunho (DBSK) – 6 February 1986
Lee Joon (MBLAQ) – 7 February 1988
Hankyung (Super Junior) – 9 February 1984
Moon Junyoung (ZE:A) – 9 February 1989
Choi Sooyoung (SNSD) – 10 February 1990
Choi Siwon (Super Junior) – 10 February 1987
Kim Dongjun (ZE:A) – 11 February 1992
Hwang Chansung (2PM) – 11 February 1990
Shim Changmin (DBSK) – 18 February 1988
Kim Kevin (ZE:A) – 23 February 1988
Kim Kyu Jong (SS501) – 24 February 1987
CL (2NE1) – 26 February 1991

March: 

Lee Hongki (FT Island) – 2 March 1990
Choi Jonghoon (FT Island) – 7 March 1990
Kim Taeyeon (SNSD) – 9 March 1989
Mir (MBLAQ) – 10 March 1991
Shin Soohyun (U-KISS) – 11 March 1989
Eli (U-KISS) – 13 March 1991
Lee Jooyeon (After School) – 19 March 1987
Lee U (F.CUZ) – 20 March 1990
Jeon Boram (T-ARA) – 22 March 1986
Park Bom (2NE1) – 24 March 1984
Oh Wonbin (FT Island) – 26 March 1990
Yoo Sooyoung (After School) – 29 March 1986
Lee Gi Kwang (BEAST) – 30 March 1990

April: 

Park Jungmin (SS501) – 3 April 1987
Eunhyuk (Super Junior) – 4 April 1986
Kim Jonghyun (SHINee) – 8 April 1990
Uee (After School) – 9 April 1988
Jessica Jung (SNSD) – 18 April 1989
Park Jaebeom (2PM) – 25 April 1987
Kang Daesung (Big Bang) – 26 April 1989
Jang Wooyoung (2PM) – 30 April 1989

May: 

• Lee Chang Min of 2AM- May 1, 1986
• Jinwoon of 2AM- May 2, 1991
• Sun Mi of Wondergirls-May 2, 1992
• Raina of Afterschool- May 7, 1989
• Boom- entertainer- May 10, 1982
• Noeul of Rainbow- May 10, 1989
• Seuolong of 2AM- May 11, 1987
• Jonghyun of C.N.Blue- May 15, 1990
• Sunny of SNSD- May 15, 1989
• Lee Ji Eun or IU- May 16, 1993
• Hae Ga Yoon of 4minute- May 18, 1990
• Taeyang of Big Bang- May 18, 1988
• Park Gyuri of Kara- May 21,1988
• Park Ye Eun of Wondergirls- May 26, 1989
• Hyonim of T-ara- May 30, 1989
• Yoona of SNSD- May 30, 1990

June:

Park Yoochun (DBSK) – 4 June 1986
Son Dong Woon (BEAST) – 6 June 1991
Kim Hyun Joong (SS501) – 6 June 1986
Kim Hyunah (4Minute) – 6 June 1992
Park Jiyeon (T-ARA) – 7 June 1993
Kim Taehun (ZE:A) – 18 June 1989
Kim Ryeowook (Super Junior) – 21 June 1987
Jung Yonghwa (CN Blue) – 22 June 1989
Nichkhun Buck Horvejkul (2PM) – 24 June 1988
Sohee (Wonder Girls) – 27 June 1992
Kang Minhyuk (CN Blue) – 28 June 1991
Seohyun (SNSD) – 28 June 1991
Shin Dongho (U-KISS) – 29 June 1994

July: 

Leeteuk (Super Junior) – 1 July 1983
Yoon Doojoon (BEAST) – 4 July 1989
Kim Heechul (Super Junior) – 10 July 1983
Jin On (F.CUZ) – 13 July 1989
Lee Taemin (SHINee) – 18 July 1993
Han Seungyeon (KARA) – 24 July 1988
Alexander Lee Eusebio (U-KISS) – 29 July 1988

Augest: 

1 – Tiffany (SNSD) turns 20
2 – Park Jung Ah (After School) turns 26
3 – Kim Hyung Joon (SS501) turns 22
3 – Kang Min Kyung (Davichi) turns 19
4 – Jung Jae Won (Nell) turns 29
4 – SunMin turns 22
6 – Andy Lee (Tension) turns 31
7 – Hai Ming (AST’1) turns 22
11 – Bekah (After School) turns 20 12 – Sun Ye (Wonder Girls) turns 20
16 – Jeong Jun Il (Mate) turns 26
17 – Uhm Jung Hwa turns 38 18 – G-Dragon (Big Bang) turns 21
18 – Jun Jin (Shinhwa) turns 29
21 – Kibum (SuJu) turns 22
21 – Lio (Battle) turns 22
21 – Song Seung Hyun (F.T Island) turns 17
24 – Yesung (Super Junior) turns 25)
25 – Lee Gyo Won (Biuret) turns 25 28 – Jokwon (2AM) turns 20
30 – So Hyun (4Minute) turns 15

September: 

Hae Lim (Wonder Girls) – 1 September 1992
Jang Hyunseung (BEAST) – 3 September 1989
Ha Minwoo (ZE:A) – 6 September 1990
Raina (After School) – 14 September 1991
Lee Jungshin (CN Blue)- 15 September 1991
Jea (BEG) – 18 September 1981
Ga-In (BEG) – 20 September 1987
Kim Hyoyeon (SNSD) – 22 September 1989
Key (SHINee) – 23 September 1991
Shindong (Super Junior) – 28 September 1985
Kan (F.CUZ) – 30 September 1991

October: 

Kim Yoobin (Wonder Girls) – 4 October 1988
Soyeon (T-ARA) – 5 October 1987
Nicole Jung (KARA) – 7 October 1991
Thunder (MBLAQ) – 7 October 1990
Lee Donghae (Super Junior) – 15 October 1986
Jeon Jiyeon (T-ARA) – 15 October 1990
Yang Seungho (MBLAQ) – 16 October 1987

November: 

Miryo (BEG) – 2 November 1981
Heo Young Saeng (SS501) – 3 November 1986
T.O.P (Big Bang) – 4 November 1987
G.O. (MBLAQ) – 6 November 1987
Choi Minhwan (FT Island) – 11 November 1992
Sandara Park (2NE1) – 12 November 1984
Park Hyungshik (ZE:A) – 16 November 1991
Kevin Woo (U-KISS) – 25 November 1991

December: 

Im Siwan (ZE:A) – 1 December 1988
Kwon Yuri (SNSD) – 5 December 1989
Choi Minho (SHINee) – 9 December 1991
Jung Heechul (ZE:A) – 9 December 1989
Qri (T-ARA)- 12 December 1986
Eunjung (T-ARA) – 12 December 1988
Seungri (Big Bang) – 12 December 1990
Onew (SHINee) – 14 December 1989
Kim Junsu(Xiah) (DBSK) – 15 December 1986
Lee Jaejin (FT Island) – 17 December 1991
Yong Junhyung (BEAST) – 19 December 1989
Park Gahee (After School) – 25 December 1980
Ok Taecyeon (2PM) – 27 December 1988
Narsha (BEG)- 28 December 1981
Kim Kibum (U-KISS) – 29 December 1990