Jessie J revealed a breast cancer diagnosis in an Instagram video posted on June 4, 2025, describing the news as “early” and part of a broader health journey. The singer noted the diagnosis occurred two months prior, around the time she released her single “No Secrets,” which she humorously linked to her situation, stating the coincidence was unplanned. Maintaining a lighthearted tone, she joked about undergoing surgery, referencing potential “disappearances” after her June 15 performance at London’s Summertime Ball and quipping about the procedure as “a very dramatic way to get a boob job,” without clarifying if she would undergo breast augmentation. Jessie J emphasized transparency with fans, previously discussing personal struggles, including a 2021 miscarriage, complications from Ménière’s disease, and contracting COVID-19 during a concert. She expressed hope that sharing her diagnosis would offer support to others, mirroring how others’ stories aided her. Details about treatment plans or potential impacts on her upcoming “No Secrets Tour 2025,” scheduled to begin in August, were not disclosed. The singer highlighted early detection as a positive aspect of her diagnosis, noting she had undergone multiple tests during this period. Her openness garnered immediate support from fans and celebrities, including Rita Ora and Leona Lewis, who commented words of encouragement. The update aligns with Jessie J’s history of candidly addressing health challenges, including temporary hospitalization in 2021 due to Ménière’s disease, which caused deafness and mobility issues. The announcement balances emotional gravity with humor, reflecting Jessie J’s approach to navigating the diagnosis. While the timeline for her treatment and return to public activities remains unclear, her focus on early detection and community support underscores the message. No further details about medical specifics, surgical procedures, or tour adjustments were provided, leaving future developments anticipated. The summary outlines Jessie J’s proactive attitude amid the diagnosis, her commitment to openness, and the personal and professional context of her health journey, as reported in the provided content.