The 22-year-old singer, who was shot and killed at her Orlando concert on Friday night (June 10), toured with Selena several times over the years.
“My heart is absolutely broken. I miss you Christina,” Selena tweeted along with a silly selfie of them two.
Brian has started a GoFundMe page to assist the Grimmie family during this time of need.
“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. 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,” he said in a statement. “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.”