2007–2014: Girls' Generation and solo activities
Jung was the first member of Girls' Generation to sign with SM Entertainment in 2000. In 2007, she was chosen as a member of the nine-member girl group that debuted on August 5, 2007. In addition to her group activities, Jung released two singles with Seohyun and Tiffany: "Love Hate" (, lit. Bad Older Brother)[10] and "Mabinogi (It's Fantastic!)" for the Nexon game Mabinogi.[11] Jung collaborated with 8Eight for the song "I Love You" from their second album, Infinity, which was released on March 3, 2008. Though she was the one singing the harmony and adlibs, she is not seen in the music video. In addition, she had various duets — one with Shinee member, Onew, called "One Year Later", and one with Park Myung-soo, "Naengmyeon" as part of a project group in the show Infinite Challenge. 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. Jung made her musical theatre debut in the South Korean production of Legally Blonde, alongside Lee Ha-nui and Kim Ji-woo;[12] the production opened on November 14, 2009.[13] The same year, 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.[14]
In March 2010, she had a cameo role on SBS' Oh! My Lady.[15] In May 2010, Jung became a regular guest on the show Happy Birthday until she withdrew on June 7, 2010, due to Girls' Generation's overseas activities.[16] She was also a regular guest on the show Star King with fellow member Yuri. Jung released a digital single titled "Sweet Delight" on October 13, 2010. In 2011, Jung participated on the soundtrack of the KBS drama Romance Town with the song "Because Tears Are Overflowing" .[17] Jung made her acting debut in Wild Romance in 2012.[18] In the same year, Jung returned to musical theatre once again with Legally Blonde, alongside Jung Eun-ji and Choi Woori. Her first performance was on November 28. In the same year, Jung sang "What To Do" (featuring Kim Jin-pyo) for the drama Wild Romance, "Butterfly" (featuring Krystal) for To the Beautiful You,[19]
In 2014, Jung released "Say Yes"' for the Make Your Move soundtrack, featuring her sister, Krystal, and Exo's former member, Kris. In August, Jung launched her own fashion line, Blanc, which was later renamed Blanc & Eclare.[23] There are now sixty stores located around the world.[24] Jung and her sister Krystal starred in their own reality television show Jessica & Krystal.[25] It premiered on June 3[26] and consisted of ten episodes.[27]
On September 30, 2014, Jung announced on her personal Weibo account that she had been "forced out" of the group. SM Entertainment later confirmed this, stating that Jung would no longer be a member of Girls' Generation. The company also stated that Girls' Generation would continue to promote with eight members while it would still manage her solo activities.[28][29] Jung also released a statement of her own through her fashion company, Blanc Group, explaining that she had been asked to leave Girls' Generation by the agency and the other members of the group.[30] Jung's final song with Girls' Generation was "Divine", which was included in the repackaged version of their Japanese greatest hits album, The Best.
2015–2016: Acting and solo debut
In 2015, Jung was confirmed to be the female lead in the Chinese romantic comedy film titled I Love That Crazy Little Thing, alongside William Chan and Nicholas Tse.[31] The film was released in August 2016, and Jung collaborated with Chan on the theme song "Love! Love! Aloha!". On August 6, 2015, SM Entertainment released an official statement stating that the company and the former member of Girls' Generation had officially parted ways.[32] The following year, Jung was confirmed to be the female lead in the autobiographical film about Stephon Marbury titled My Other Home, alongside Marbury himself.[33] She was also cast in the short action comedy Two Bellmen Three alongside Ki Hong Lee. She took a part in Chinese sport's variety show ''YES! Coach'' as well, where she participated in a swimming competition after being trained by professional swimmer Sun Yang. Jung then became the main host of the beauty show Beauty Bible, alongside Kim Jae-kyung.[34]
2017–2019: My Decade, and debut novel
On April 14, 2017, Coridel Entertainment released a series of teaser pictures confirming that Jung was set to make her first comeback of the year with a digital single titled "Because It's Spring", on April 18, 2017.[50] In the same month, Forbes included Jung in their 30 Under 30 Asia 2017 list which comprises 30 influential people under 30 years old who have made substantial effect in their fields.[51] "Because It's Spring" was later included on her third EP My Decade, released on August 9, 2017, to celebrate her 10th anniversary since debut. Jung took part in writing five of the six songs on the album. The lead single "Summer Storm" and its music video were released on the same day. In July 2017, Jung embarked on her first mini-concert tour titled "On Cloud Nine". The tour's first show was in Taipei, taking place on July 29, 2017. Jung also held shows in Seoul, Osaka, Tokyo, and Bangkok as part of the tour. A show scheduled to take place in Hong Kong on October 15, 2017, was cancelled due to Typhoon Khanun affecting the area.[52] The final show of "On Cloud Nine" took place in Macau on March 3, 2018.[53][54]
2022–present: Chinese activities, and Beep Beep
From May 20 to August 5, 2022, Jung participated in the third season of Sisters Who Make Waves, a Chinese survival reality television show where female celebrities over 30 years old compete to debut in a ten-member girl group.[72] She eventually placed second in the finals and debuted in X-Sister.[73] Jung also took part in the musical reality show Sound Like Summer Flowers as a team manager.[74] She later reunited with her castmates from Sisters Who Make Waves to star in the reality show Seaside Band, which premiered in November 2022.[75]
On November 7, 2023, it was announced Jung would be releasing her fourth extended play titled Beep Beep on November 22.[76] Along with the release, Jung embarked on her concert tour titled Diamond Dreams. The tour began in Macau on November 25 and continued to Singapore,
