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5th June 2017
11:14am BST
Tonight's One Love Manchester concert is an event that will be remembered for a long time, and has reported raised over £10m for families of the victims of the atrocity.
Stars from all over the globe travelled to Old Trafford to take part in the fundraiser but there's one detail that you might not have noticed.
Katy Perry was one of the stars that appeared, performing several of her hits including Part Of Me and Roar.
She went one step further to pay tribute to the victims though, reportedly featuring their faces on the back of her outfit on the night.
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