An estimated 50,000 people gathered at Old Trafford cricket ground for the concert. Photo: BBC / Screenshot The concert at Old Trafford in Manchester City aims to support the families and victims affected by that attack. Grande herself headlined the performance, and supporting acts include Justin Bieber, Coldplay, Katy Perry, Take That, Pharrell Williams, Niall Horan, Miley Cyrus, Usher, Robbie Williams, Little Mix and The Black Eyed Peas. Everyone who attended the Manchester Arena concert was invited to apply for free tickets to the event. Grande said she wanted to return to the "incredibly brave city" to spend time with her fans and to "honour and raise money for the victims and their families".