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."