So far, 22 people have been confirmed dead and another 59 have been injured following the explosion at Manchester Arena just after the 23-year-old star had finished her performance.
Writing on social media, Ariana wrote: “Broken. From the bottom of my heart, I am so so sorry. I don’t have words.”
Her manager, Scooter Braun, also released a statement, which read: “Tonight our hearts are broken. Words cannot express our sorrow for the victims and families harmed in this senseless attack.
“We mourn the lives of children and loved ones taken by this cowardly act.
“We are thankful for the selfless service of Manchester’s first responders who rushed towards danger to help save lives.
“We ask all of you to hold the victims, their families, and all those affected in your hearts and prayers.”
Other celebrities have also been expressing their sympathy, including the likes of Harry Styles and Liam Gallagher:
I'm heartbroken over what happened in Manchester tonight.
Sending love to everyone involved. H
— Harry Styles. (@Harry_Styles) May 23, 2017
In total shock and absolutely devastated about what's gone down in MANCHESTER sending Love and Light to all the family's involved LG x
— Liam Gallagher (@liamgallagher) May 23, 2017
My thoughts, prayers and tears for all those affected by the Manchester tragedy tonight. I'm sending all my love.
— Taylor Swift (@taylorswift13) May 23, 2017
Manchester in my thoughts this morning, music is meant to bring people together and give people joy and happiness. Not war.
— Danny Jones (@itsDannyJones) May 23, 2017
My thoughts and prayers go out to everyone affected in Manchester.
— Selena Gomez (@selenagomez) May 23, 2017
Sending all my love to every single family at the Manchester show last night. So upsetting
— Louis Tomlinson (@Louis_Tomlinson) May 23, 2017
Waking up to the realisation that so many innocent people are dead! So sad and heartbroken for all involved.
Manchester I love you
— Howard Donald (@HowardDonald) May 23, 2017
So sad to hear the news from Manchester….
Prayers and thoughts go out to everyone involved..
Love to you all
— Mark Owen (@OfficialMarkO) May 23, 2017
Can't believe what I'm reading about Manchester. So absolutely heartbreaking.
— Tom Fletcher (@TomFletcher) May 23, 2017
Absolutely Horrendous what happened in Manchester tonight. My thoughts are with the great people of Manchester and also Ari and her team xx
— Niall Horan (@NiallOfficial) May 23, 2017
We opened our show talking about Manchester. Our thoughts are with everyone affected. https://t.co/yrgu03JTK8
— James Corden (@JKCorden) May 23, 2017
It is thought that Ariana Grande is “unlikely” to perform her scheduled show at London’s O2 Arena on Thursday [25 May], and Take That, whose thee-night tour at Manchester Arena was due to start on Thursday, are also unlikely to go ahead with their scheduled shows.