Jaslyn Hooi Yue Yann (Chinese: 许妤欣; pinyin: xǔ yú xīn; born 5 October 2000) is a Singaporean badminton player.

[2] At the age of 17, she represented Singapore at the 2018 Summer Youth Olympics and reached the semi-final in girls’ badminton singles tournament but eventually finished fourth.

[5] Hooi attended the customised Diploma in Business Studies (Entrepreneurship Management Option) catered specifically for student-athletes by Ngee Ann Polytechnic.

[6] During the COVID-19 period, when international travel and competitions were restricted, she completed a 30-week internship as an investment analyst while juggling intensive training sessions.

[8] In 2017, she competed at the Jaya Raya International, an under-19 Junior Grand Prix tournament, and emerged as the runner-up in the women's single competition.

[10] Despite spraining her right foot during one of the preliminary matches, Hooi qualified for the knockout stage after topping Group E. Playing through pain, she managed to win the quarter-final by beating Jennie Gai (USA) in straight sets of 21–16, 21–18.

[15] Hooi turned her attention locally and clinched the women's singles titles at the Singaporean National Badminton Championships for two consecutive years (2020,[16] 2021[17]).

At the 2021 SEA Games that was delayed due to COVID-19 until May 2022, Hooi again represented the Singapore women’s badminton team in the first round against the Philippines.

[18] An injury in the second half of 2022 after the 2021 SEA Games completely derailed Hooi's ambitious plan to surge up the World Ranking to have a shot at the 2024 Olympics in Paris.

As an unranked player, she had to enter the lower-tier BWF International Series tournaments starting from the qualifying rounds.

[13] After failing to defend her titles in Australia, Hooi came close to winning another in New Zealand at the North Harbour International, only to be defeated in the final by Tsai Hsin-Pei of Chinese Taipei 18–21, 13–21.