On Monday night, the 23-year-old pop star tweeted,
broken. from the bottom of my heart, i am so so sorry. i don't have words.
After the attack, TMZ reported the singer was "in hysterics."
There are unconfirmed reports that Grande has reached out to the victims' families and offered to pay for funeral costs.
Her fandom -- known as the Arianators -- have taken to social media in full force since the attack, tweeting their support of the singer and their deepest condolences to all the victims.
One of the more heart-wrenching hashtags to surface in Grande's honor is #ThisIsNotYourFaultAriana.
Fans are also sharing an image to show solidarity -- a black peace ribbon on a pink background with a nod to her Dangerous Woman album.
Several of Grande's fellow pop stars and friends tweeted their support of Ari, too.
Miley Cyrus posted a sweet photo with her friend on Instagram.
Katy Perry sent a heartfelt message and also took to the streets of NYC to hug fans and spread love.
Nicki Minaj said her "heart hurts" for her "sister" and all those affected.
In an emotional opening monologue before "The Late Late Show" aired on Monday night, James Corden said,
My thoughts and prayers are with everyone in Manchester tonight. All of the staff at the MEN Arena, all of the security teams, all of the emergency teams, Ariana and her team and all of those families affected by tonight. We'll all go to bed holding our little ones even tighter this evening.
Grande has not posted to social media since her initial tweet.
We continue to send love to Ariana, the people of Manchester, and all of those affected by this deadly attack.