Flack had been due to present a reality series about cosmetic surgery called The Surjury on Channel 4, but it was cancelled following her death in February 2020. She has a cameo role in the film Greed, which was released on 21 February 2020. The trailer, which featured her role, premiered on the same day.
Flack was found dead in her flat, in Stoke Newington, London, on 15 February 2020, aged 40. The lawyer acting for her family stated that her death was a suicide. A Love Island highlights episode, due to be shown on ITV2 on the day of her death, was cancelled. The inquest into her death opened on 19 February and heard she had been found hanged in her flat. The inquest was adjourned until 5 August 2020. E4 pulled a Love Island sketch on Robot Chicken involving Bitch Pudding out of respect due to her suicide. On 6 August, after a two-day hearing, the coroner found that Flack's death was a suicide. She had killed herself after learning she would be prosecuted for allegedly assaulting her boyfriend, following a long struggle with "fluctuating mental health" that was exacerbated by the stress of fame.