Grande today said she was "broken" and at a loss for words over the deadly terror attack at her concert.
"Broken. From the bottom of my heart, I am so so sorry. I don't have words," she tweeted hours after the powerful blast.
Singer Katy Perry tweeted, "Praying for everyone at Ariana Grande's show."
Cher reflected on her personal attachment with the city, writing "My prayers go out to the people of Manchester... Had special times there from youth and beyond."
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Ellie Goulding said, "Sending love to those affected in Manchester."
Singer Halsey wrote, "What is happening in Manchester is absolutely terrifying. Praying everyone affected has found safety and hope Ariana is okay :( Jesus."
"Our prayers and strength to the victims and their families involved in this tragedy in Manchester. Stay strong," actor Dwayne Johnson tweeted.
Ryan Seacrest said he is shocked. "Stunned by the news coming in from the U.K. My thoughts are with the fans and families at Ariana's Manchester show. Awful."
Actress Zelda Williams said, "I am at a loss. All my thoughts are with Manchester and those affected. A tweet seems a pointless sentiment when faced with such tragedy."
Jennette McCurdy, who starred alongside Grande in the Nickelodeon television series "Sam & Cat" tweeted, "Thinking of Ariana and her fans and everyone in Manchester. So much love."
"I'm heartbroken over what happened in Manchester tonight Sending love to everyone involved," Harry Styles tweeted.
"My thoughts and prayers are with the people of Manchester, any one affected, @ArianaGrande and the entire crew. Heartbreaking," wrote Pink.
Ruby Rose said, "Sad to my stomach for everyone in Manchester and to the concert goers, @ArianaGrande and everyone affected. Prayers and love."
Selena Gomez wrote, "My thoughts and prayers go out to everyone affected in Manchester."
Taylor Swift tweeted, "My thoughts, prayers and tears for all those affected by the Manchester tragedy tonight. I'm sending all my love."
Chris Pratt wrote,"For grace. For vigilance. For justice. #manchesterattack"
Bieber tweeted, "#PrayforManchester".
Oscar-winning singer Sam Smith said, "Hold each other close today and everyday. Love is the only way to answer to something this hateful."
Bollywood superstar Shah Rukh Khan, actress Priyanka Chopra, Shabana Azmi and filmmaker Karan Johar also condemned the terror attack.
Shah Rukh tweeted, "Extremely sad to start days when innocent lives are lost. Prayers for the deceased & strength to the families of the Manchester victims. (sic)"
"I'm numb with shock. Can't make sense of whats happening in the world. Where is all this hate coming from? Manchester attack prayers for victims.(sic)" Azmi said.
Johar wrote, "Helpless and sad at what's happening... prayers and strength to all the families and loved ones of the lost lives in the Manchester attack."
Anil Kapoor tweeted, "Please hear @fareedzakaria on Manchester bombing, no political aim but to kill...Shocking."
Sonam Kapoor, who is in currently in Cannes, wrote, "I'm so angry and heartbroken at the state of the world. My thoughts and prayers with the victims and families in Manchester.(sic)"
Anushka Sharma said, "Deeply saddened to hear about the Manchester attack. This brutality and hatred is so so horrid and frustrating. Prayers are with the victims."
"Extremely sad to hear about what happened at the Ariana Grande concert #ManchesterAttack," Sidharth Malhotra tweeted.
Anupam Kher wrote, "Innocent people becoming victims of terrorism anywhere can't be just statistics. The world needs to unite & fight it together. #Manchester."
Alia Bhatt tweeted, "So upset!!How can this happen every few months?? Feel soo helpless! Prayers for the victims and their families! #manchesterterrorattack."
However, following the blast there was no clarity on whether she will continue with her tour.
Her current 'The Dangerous Woman Tour' is in support of her third studio album, 'Dangerous Woman' which released last year on May 20. The tour began on February 3, in Phoenix, Arizona.