As Stevie Wonder finished off his performance at British Summer Time Hyde Park, he made an important announcement.

The “I Just Called To Say I Love You” singer revealed that in Septemeber he will undergo a kidney transplant, adding, “I’m all good, I’m all good.”

Wonder, 69, was greeted by cheers of support from the crowd.

According to BBC, he made the announcement noting that he still has three more shows to play before the operation and that he didn’t want “rumours” to start about his health.

“I’m all good, I’m all good, all good, I have a donor and it’s all good,” he said.

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“I want you to know, I came here to give you my love and thank you for your love. I love you and God bless you.”

Wonder treated the crowd in London with songs like “For Once In My Life”, “Signed, Sealed, Delivered” and “Master Blaster”.

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The five nights of British Summer Time has icons headlining every night. On Friday, Cรฉline Dion took the stage and blew the audience away. Barbra Streisand will perform on Sunday, Florence + The Machine on July 13 and Robbie Williams on July 14.