Jessica was the first member to be signed with SM Entertainment in 2000. In 2007, she was chosen as a member of the group Girls' Generation. The 9-member girl group debuted on August 5, 2007.
On September 30, 2014, Jessica announced on her personal Weibo account that she was "forced out" of the group.SM Entertainment later confirmed this, stating Jessica would no longer be a member of Girls' Generation due to constant conflicts with the group's and Jessica's schedules, and Girls' Generation would continue to promote as eight members while the company would still manage Jessica's solo activities. Jessica also released a statement of her own, through her fashion company Blanc, explaining she was one-sidedly asked to leave Girls' Generation by the agency and members. Jessica's last released song with Girls' Generation is "Divine", released as a part of the repackaged version of their first Japanese greatest hits album, The Best.
Solo singing career
In addition to her group activities, Jessica released two singles with Seohyun and Tiffany: "Love Hate" (Hangul: "오빠 나빠", lit. Bad Older Brother) and "Mabinogi (It's Fantastic!)". Jessica collaborated with 8Eight for the song "I Love You" from their second album, Infinity, which was released on March 3, 2008. She is not the one in the music video, but is the one singing the harmony and adlibs. In addition, she had various duets — one with Shinee member, Onew, called "One Year Later", and one with Park Myung-soo, "Naengmyeon". She sang the "Seoul Song" with Super Junior's Leeteuk, Sungmin, Donghae, Siwon, Ryeowook and Kyuhyun and fellow group members Taeyeon, Sunny, Sooyoung and Seohyun.
In 2012, Jessica appeared in Wild Romance, playing the role of Kang Jonghee, who is Park Mu-yeol’s unforgettable first love. She had her screentime in approximately eight episodes. In the same year, Jessica returned to musical theatre once again with Legally Blonde, alongside Jung Eun-Ji and Choi Woori. Her first performance was on November 28.
Variety show appearances
In May 2010, Jessica became a regular guest on the show Happy Birthday until she withdrew on June 7, 2010 due to Girls' Generation's overseas activities.
She was also a regular guest on the show Star King with fellow band member Yuri.
In 2009, she took a special part on the show Infinity Challenge for their summer special, in which she was chosen to sing a duet entitled "Naengmyun" with Park Myung-soo, one of the MCs.
In 2014, Jessica and her sister Krystal were featured in their reality television show Jessica & Krystal. It premiered on June 3 and consisted of ten episodes.
Blanc & Eclare
In August 2014, Jessica launched her own fashion line, Blanc, which was later renamed Blanc & Eclare.