In a concert performance last night in Miami, Selena Gomez gave an emotional tribute to slain singer Christina Grimmie, dedicating a cover of Hillsong Worship’s ‘Transfiguration’ to the former The Voice contestant who was murdered Friday night in Orlando.

“When she was 14, we met her – my parents and I signed her. And one thing about Christina and her family is that she holds her faith so closely to her,” said Gomez. “It’s not about her religion, and it’s not about good deeds. It’s just that she had faith. And I don’t really understand how this happened, but I would like to dedicate this next song to her.”

Gomez wept during the performance, which was captured on video by fans and has been widely shared on social media since. The two became friends after Gomez’ stepfather Brian Teefey became Grimmie’s manager, having discovered her on YouTube. Grimmie would go on to open for Gomez in North America during the “We Own the Night” tour in 2011.

Earlier yesterday, Gomez posted a photo of her and Grimmie to Twitter, saying “My heart is absolutely broken. I miss you Christina.”

Teefey, meanwhile, has established a GoFundMe page to raise money for Grimmie’s family, on which he paid tribute to the singer. “Words cannot begin to describe the pain I am feeling. I learned this business through the eyes of a father and Christina was like a second daughter to me,” he said. “All I wanted to do was assist her in achieving her musical dreams while protecting her from the pitfalls associated with the business. I never could have imagined this horrific event being one of the pitfalls needing to be avoided. In Christina’s honor I have created a Go Fund Me page to assist her family in their time of need. As family Mother, Father, and Brother made the ultimate family sacrifice to support Christina on her musical journey. They did nothing but love her and support her as family the best they knew how, the only worry I want them to have at this point is that of recovery.”