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ORLANDO, Fla. — Singer Christina Grimmie, who was a top 3 finalist in NBC’s “The Voice,” died early Saturday after a gunman shot her following a performance in Florida, authorities said.

A man armed with two guns walked up to the 22-year-old singer as she was signing autographs late Friday night and opened fire, Orlando police spokeswoman Wanda Ford said.

The gunman fatally shot himself after Grimmie’s brother tackled him, according to authorities.

“Her brother is a hero for saving and stopping him from not hurting anyone else,” Ford said.

The singer had performed at The Plaza Live theater Friday night, along with the band Before You Exit, when the shooting broke out. She was rushed to a hospital in critical condition and died a few hours later.

“It is with a heavy heart that we can confirm that Christina has passed and went home to be with the Lord,” her publicist Heather Weiss said in a statement.

“She was shot at her show in Orlando and, unfortunately, didn’t survive the gunshot wounds. We ask at this time that you respect the privacy of her family and friends in their time of mourning.”

Grimmie finished third on Season 6 of “The Voice.” She was discovered on YouTube, where she has a massive following.

Stars of “The Voice” reacted to the news, like Adam Levine, who posted a photo with Grimmie and the caption, “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.”

Blake Shelton posted he was “stunned and disgusted and heartbroken” at the news on his Twitter account.

Christina Aguilera offered her condolences via Twitter as well.

Before the shooting, the singer posted video on social media encouraging fans to come out to the theater.

https://twitter.com/TheRealGrimmie/status/741387106921140224

It’s unclear how the gunman got a gun into the venue or whether attendees were checked for weapons.

“Police on Saturday said the gunman had plotted the attack, traveling to the show from another city in Florida with the intent of carrying out the shooting.

Orlando Police Chief John Mina said “he came here to commit this crime and had plans to travel back to where he came from.”

Mina said there was no indication Grimmie knew the attacker. Police confirmed the attacker’s identity as 27-year-old Kevin James Loibl, but have not named a possible motive.

The band that was touring with Grimmie said on Twitter that its members are heartbroken.

“Christina was such a loving, caring, beautiful person with the biggest heart,” Before You Exit said a statement attached to one of its tweets. “She was an absolutely incredible musician and an even better friend.”

Grimmie rose to fame with her YouTube channel, which currently has over 3.2 million subscribers. Fans have begun flocking to her videos, leaving messages of sadness, support, and condolences to Grimmie’s loved ones.

One user wrote on her cover of “Hello” by Adele:

“Hello from the other side Christina. Don’t worry. There will come a day when every one of us will be on the other side. And then we’ll hear your voice again.”

Saturday morning, Grimmie’s Twitter account posted one final message.

https://twitter.com/TheRealGrimmie/status/741640897440317441