Christina Grimmie, a third place finalist on The Voice, was shot dead after a concert Friday night in Orlando, Fla.
She was 22.
The gunman approached and opened fire on the rising star as she was signing autographs just before Grimmie's brother tackled the man, who then shot himself.
Grimmie did not know her killer; police suspect he was a deranged fan.
The world mourns the young singer as we all try to make sense of this shocking act of violence.
Stars and have taken to social media to pay tribute to the late Grimmie. Read their heartfelt tributes below.
Adam Levine, who was Grimmie's coach on The Voice, shared the photo above to Instagram, writing, "I'm sad, shocked and confused. We love you so much Grimmie. We are all praying hard that you can pull through this...this just isn't fair."
"I'm stunned and disgusted and heartbroken that we lost that sweet little girl... Keeping @TheRealGrimmie family in my heart and mind," Shelton tweeted.
"So sad passing of @TheRealGrimmie. Beautiful member of #TheVoice family & true #Fighter. My heart goes out to her family, friends & fans. xo," wrote The Voice coach Christina Aguilera.
"So sad about @TheRealGrimmie. I'm still in shock. She was special. Had IT. Talented. Kind. Funny. Loving. Courageous. We hurt w her family," tweeted The Voice host.
Before You Exit
Before You Exit, the band Grimmie opened for Friday night, tweeted "Today we lost an angel, sister, and a beloved friend. #RipChristina" alongside a longer tribute calling her "a loving, caring, beautiful person with the biggest heart."
The Voice season 9 winner Jordan Smith tweeted, "Prayers going up for @TheRealGrimmie right now. So heartbroken to hear this news. #PrayForChristina," later writing, "A star has been snuffed out. An amazing story unwritten."
A tweet sent from The Voice official Twitter account read, "There are no words. We lost a beautiful soul with an amazing voice. Our hearts go out to the friends, fans and family of @TheRealGrimmie."
"My heart is with @TheRealGrimmie tonight. I'm speechless. #PrayForChristina," wrote Alisan Porter, season 10 winner of The Voice.
"My heart is absolutely broken. I miss you Christina," Gomez tweeted along with the photo above.
"#RIPChristina my thoughts and prayers are with her loved ones," tweeted Demi Lovato, just after writing, "What the f**k is wrong with people."
Meghan Trainor shared the pic above to Instagram, writing, "I remember geeking out and telling you how I would watch your YouTube videos in high school, and how you were so kind and responded to a stranger with love. This is unfair and heartbreaking. We lost one of the most talented singers and one of the kindest hearts. We will all miss you @therealgrimmie #ripchristinagrimmie"
Nick Jonas tweeted, "My heart hurts hearing this news.. So terrible. Praying for Christina and her family. #prayforchristina," then later shared the pic above to Instagram, writing simply, "#ripchristina" with a broken heart emoji.
"So sad right now. My thoughts & prayers go out to Christina Grimmie's friends/family. What an incredible talent that won't be forgotten," Haynes tweeted.
"When you die, your body dies, but your soul lives on forever, as will hers. Rest In Peace Christina Grimmie. A beautiful talent," tweeted Puth.
"Devastating Tragedy @TheRealGrimmie," Lambert tweeted.
"Horrified to hear the news about Christina Grimmie. Too young & too much talent to leave us this soon. Sending [heart emoji] 2 her loved ones & fans," wrote Jones on Twitter.
"Rest peacefully Christina G. Such a beautiful soul gone so soon. Never forgotten. Prayers for her family,friends,& fans," tweeted Lil Wayne.
"we will miss you @TheRealGrimmie. thank you for sharing your talents with the world. our thoughts are with your family," tweeted the band DNCE.
"Terribly saddened & angry at the senseless murder of @TheRealGrimmie last night. RIP, we loved her voice & remember," the band tweeted, including the cover Grimmie sang of their song "Counting Stars."
"I am devastated by this news & I'm at a loss for words. Christina, may your spirit live on you beautiful talented girl. #RIPChristina," tweeted Justice.
"I can't understand this. I can't. You were an absolute shining light Christina and you made your mark. #RIPChristina," tweeted Platten.