Levine -- who was Grimmie's coach when she competed on the sixth season of The Voice -- reached out to her family over the weekend after hearing the news that the 22-year-old was shot and killed by a deranged fan Friday night (June 10).
"I found out this morning that Adam Levine personally called my mother and said he will pay for her funeral and her plane flight, and I was blown away," he shared in a post.
In addition to Levine's generosity, Marcus said that the GoFundMe page set up by manager Brian Teefey is helping with funeral expenses in this difficult time. At the moment, donations have topped $100,000.
"Words cannot express," Marcus wrote. "Words cannot express...literally I have no words. I promise both my parents and I will read every one of these personalized messages. I'm so blown away by everything right now. But all I can say is thank you. And Christina will be missed and never ever forgotten.
Grimmie was gunned down by 27-year-old Kevin James Loibl -- who was quickly tackled by Grimmie's brother before shooting himself -- on June 10 after opening for pop-rock band Before You Exit at the Plaza Live. She was signing autographs at a meet and greet after the show when Loibl shot her.
Levine shared his grief on Twitter after he heard the tragic news.
Behati and I are absolutely devastated and heartbroken by Christina Grimmie’s death. Our hearts go out to her family pic.twitter.com/y4OMkm0uXu
— Adam Levine (@adamlevine) June 11, 2016
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