It has since been reported that 22 lives were claimed, and many more concertgoers were severely injured.
Immediately, there was an outpour of love for Ariana and the victims of the attack on social media, including a ton of support and love from fellow celebrities.
Miley Cyrus posted a touching photo of herself and Ariana on Instagram with the following message,
Wishing I could give my friend Ariana Grande a great big hug right now... love love love you... so sorry you had to be a part of such a tragic event! My most sincere condolences to anyone and everyone affected by this horrific attack! All I can do is send as much hope and peace your way! This must end! No more war... no more innocent lives taken.
Additionally, during last night's season finale of The Voice, Miley dedicated a moving performance of her new song "Malibu" to those victim to the attack.
Before singing, she said,
I'd like to dedicate this song to my good friend Ariana Grande and everyone who experienced that horrific attack yesterday. Our hearts are with you.
And of course, Miley is not the only one with Ariana and the victims on her mind.
I have played some of my favorite shows in Mexico and it felt right to come celebrate with you. But tonight, it doesn't feel like a night to celebrate. Last night, there was a tragedy in my hometown of Manchester. I am left with a hole in my heart. I went to my first show in that arena and I've have some of my best experiences in my life in Manchester. We have a choice every single day that we wake up of what you can put into the world, and I ask you to please choose love every single day. I promise that we will be back very soon to Mexico — we will be back to do a full show. But tonight, if it's okay with you, we're gonna play a small acoustic set. I hope you understand and I hope you will join me in a moment of silence for all the victims and their families.
You can watch Miley's emotional performance below, and we send continued love and support to everyone touched by this tragedy.