Ethel Kennedy's funeral on Wednesday was attended by three presidents and three musical superstars: Sting, Kenny Chesney and Stevie Wonder.

After a eulogy from former President Clinton, Sting, guitar in hand, made a surprise appearance at the Cathedral of St. Matthew the Apostle in Washington, DC, performing his emotional 1987 hit “Fragile.”

“We have a surprise that is not on the program, but we are incredibly grateful and honored to have a singer my grandmother loved,” Ethel Kennedy's grandson, Joe Kennedy III, told mourners.

“Sounds the same at our family singalong, doesn't it?” he joked after Sting was finished.

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Sting performs his hit song “Fragile” at Ethel Kennedy’s funeral. (Reuters/Leah Millis)

President Biden, who spoke at the end of the service, became visibly emotional while listening to the song and later said Kennedy reminded him of his own mother.

Before “Sting,” country star Kenny Chesney talked about his friendship with Ethel and their daughter Rory Kennedy and sang “You are My Sunshine.”

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“The moment I walked into Ethel's house, she and I shared a soulful bond and I am so grateful for that friendship,” Chesney said before he began singing. “Every time I was around your mother I felt great because she felt like sunshine.”

Kenny Chesney sings “You are My Sunshine.” (Reuters/Leah Millis)

Joe Kennedy later told the audience before Biden's eulogy that he was “honored to announce one final surprise” and described Stevie Wonder as a “dear friend of my grandfather and grandmother.”

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Wonder said he decided to tour again because of Ethel Kennedy, adding that he was there to “grieve with you and share my love with you.”

Stevie Wonder sings “Isn't She Lovely” at Ethel Kennedy's funeral. (Reuters/Leah Millis)

He first sang “The Lord's Prayer” before launching into a special rendition of “Isn't She Lovely” to thunderous applause, in which he inserted Ethel's name into the song and encouraged the audience to sing along as he pulled out his harmonica.

During his eulogy, Biden joked that Wonder told him that if he got another Grammy, he planned to give the Grammy to the president.

Presidents Biden, Obama and Clinton appeared emotional as they listened to Sting's “Fragile” at Ethel Kennedy's funeral on Wednesday. (Reuters/Leah Millis)

“The only guy in this whole damn church who can’t sing a note,” he laughed at himself.

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Ethel Kennedy, the widow of former Senator Robert F. Kennedy, died last Thursday at the age of 96. Robert F. Kennedy was assassinated in June 1968 while running for the Democratic presidential nomination.