Niall Horan and Justin Bieber will join Ariana Grande at a benefit concert in Manchester for the families of the victims of the Arena bombing.
The 'One Love Manchester' benefit concert will be held at the Emirates Old Trafford Cricket Ground on Sunday 4 June "to honour and raise vital funds for the victims and families who were tragically affected by the Manchester attack".
Coldplay, Katy Perry, Miley Cyrus, Pharrell Williams, Usher and Take That are just some of the massive names who will be performing at the show, which will be broadcast on BBC TV and radio and streamed around the world.
In a Twitter post, Ariana Grande said she will "be returning to the incredibly brave city of Manchester to spend time with my fans and to have a benefit concert in honour and raise money for the victims and their families."
"Our response to this violence must be to come closer together, to help each other, to love more, to sing louder and to live more kindly and generously than we did before", she continued.
The singer said she wanted her tour to be "a safe space" for her fans to "express themselves".
All money raised from the benefit show will go to the We Love Manchester Emergency Fund, which was set up by Manchester City Council and the British Red Cross to help families and victims of the horrific attack.
22 people were killed in the bomb blast, which happened at the end of Ariana's Manchester Arena show last Monday night.