Jessie J diagnosed with "early breast cancer," says she'll undergo surgery after London music festival

Jessie J was diagnosed with "early breast cancer," the U.K. pop singer said on social media on Wednesday.

The 37-year-old artist, whose real name is Jessica Ellen Cornish, said she was diagnosed with breast cancer before her latest single "No Secrets" was released in April. She said she will undergo surgery following her performance at Summertime Ball on June 15, an annual music festival in London.

"Cancer sucks in any form, but I'm holding onto the word 'early,'" she told her nearly 14 million followers on Instagram in a video.