Watch Selena Gomez's Tearful Tribute To Her Friend Christina Grimmie In Concert

"I don't really understand how this really happened."

On Friday night, YouTube star and former Voice contestant Christina Grimmie was shot and killed while signing autographs after a performance in Orlando, Florida. She was 22 years old.

Grimmie was friends with singer Selena Gomez, whose stepfather Brian Teefey discovered her at the age of 14. The pair even toured together in 2011. 

On Saturday, Gomez shared her sadness over Grimmie's death on Twitter, writing, "My heart is absolutely broken. I miss you Christina," accompanied by a photo of the two of them.

Saturday night, during a concert in Miami, Gomez paid emotional tribute to her late friend. Voice breaking, she told the crowd, "One thing about Christina and her family is that she holds her faith so closely to her."

Of Grimmie's murder, Gomez said tearfully, "I don't really understand how this really happened, but I would like to dedicate this song to her."

Gomez took a seat at the piano to perform Hillsong Worship's "Transfiguration." She also broke down in tears during a performance of her own song "Nobody."

Watch the heartfelt tribute below:

There is currently a GoFundMe page set up by Teefey to raise money for Grimmie's family during this difficult time. 

Teefey, who was Grimmie's manager, explains in the description, "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."

(H/T: Variety)