Sunny (Hangul: 써니; born Lee Soon-kyu on May 15, 1989) is a South Korean singer, radio DJ, music show host and member of the Korean girl group Girls' Generation, formed by SM Entertainment in 2007.
Sunny has mentioned that she lived in Kuwait when she was an infant. However, her family then moved to South Korea around the time of the Gulf War. She has two older sisters, all of which share the same birthday. Her father was in the college band Hwaljooro with Bae Chul-soo. She is the niece of Lee Soo Man, the founder of SM Entertainment.
In 1998, Sunny entered Starlight Entertainment and became a trainee for 5 years before transferring to Starworld where she became a member of a duet called "Sugar" which never debuted. One of her older sisters was the manager for Sugar, but when the duo disbanded, she became active in other parts of the music industry.
In 2007, she was then recommended by the singer Ayumi, who transferred to SM Entertainment. After several months of training under SM Entertainment, Sunny debuted as a member of Girls' Generation at the same year.
Sunny is mainly known for her "aegyo" or cute actions.
She was a co-DJ of the radio show Chunji until the broadcast ended in July 2008.
She featured on the Heading to the Ground soundtrack, singing a duet with Taeyeon in the song SarangInGulYo and another song titled Motion performed with the vocal line of the group.
She participated in the S.E.O.U.L. song project along with Super Junior's Kyuhyun, Leeteuk, Ryeowook, Sungmin and Donghae and fellow group members Seohyun, Sooyoung, Jessica and Taeyeon. She was a permanent member on the show Star Golden Bell until Girls' Generation's song Oh! came out.
Sunny alongside with Yuri was a part of reality show Invincible Youth in which they were a part of G7, consisting of 7 girls from idol groups. Due to Girls' Generation's Japanese debut and other activities, Sunny left the show, along with Hyuna and Yuri, in June 2010.
She also co-hosted a music show called The M with Kim Hyung Jun of SS501 and Im Seulong of 2AM but had to leave the show due to her busy schedules. Her last appearance as an MC for the show was on April 4, 2010. Sumber : Wikipedia