The opening number of Global Citizen’s Vax Live: The Concert to Reunite the World was especially sentimental. Jennifer Lopez treated the crowd to a live cover of “Sweet Caroline” — a touching performance not only dedicated to her mother, but also featuring her.

“When I was thinking about what song to sing tonight, I remembered the song she used to sing to me as a baby,” J. Lo told the crowd after explaining that she missed spending Christmas with her during the pandemic.

She then introduced her vaccinated mother to the stage to help her out with the Neil Diamond classic she would sing to her as a baby.

“When I used to rock you,” her mom sweetly said, “I would say, ‘Sweet Jennifer.’”

Vax Live was put on with the mission to seek wider, more equitable distribution of COVID-19 vaccines around the world, with the help of some big stars.

The Selena Gomez-hosted fundraising event aired on May 8 on ABC, ABC News Live, CBS, YouTube (stream it here) and iHeartMedia broadcast radio stations.