Jessica Louise Nelson is a former English singer. She rose to prominence as a member of the girl group Little Mix, who were formed during the eighth series of The X Factor in 2011. As part of Little Mix, Nelson achieved seventeen top-ten singles and five number-one singles on the UK Singles Chart.
In 2019, Nelson released a documentary titled Jesy Nelson: Odd One Out, which focused on her struggles with body image, mental health and online bullying. It won the Factual Entertainment Award at the 25th National Television Awards and the Visionary Honour Award for Documentary of the Year. Nelson's private life and her departure from Little Mix in December 2020, have been the subject of media scrutiny in the UK. In October 2021, she released her debut single titled "Boyz", featuring rapper Nicki Minaj. It debuted at number four on the UK Singles Chart. In April 2023, she released her follow-up single, "Bad Thing". Nelson is also an advocate for Spinal muscular atrophy, following the diagnosis of her twin daughters.