Jessie J 'is feeling really positive' amid health battle Pop star Jessie J is set to attend Radio 2 In The Park this weekend. 5 September 2025 Jessie J is "feeling really positive" amid her ongoing health battle. Jessie J is set to attend Radio 2 In The Park The 37-year-old pop star underwent surgery for early-stage breast cancer in June, but DJ Scott Mills has revealed that Jessie plans to attend Radio 2 In The Park in Essex, south-east England, over the weekend.