The former Oasis singer announced the string of solo shows on his Twitter account, with tickets available from 9am on Friday morning.
The money raised from the Manchester show, at the O2 Ritz on May 30, will be donated to the Manchester Evening News' British Red Cross appeal, which was set up to help relatives of those affected by the tragedy.
Speaking to the paper about his decision, he said: "I just knew I had to. I'm not in it for the money. The gig was going to happen anyway and we all have to do what we can. I want to try and help pick people up. People like me, doing what we do, it's our duty to give people a good time."
Of Monday night's suicide bombing at Manchester Arena, he said: "It's outrageous. Just so sad. What can you do? It's just f****** out of order. There are kids and people dying all over the world. And for what?"
"I'd gone to bed early - about 10pm - then got up in the morning to a text from my other brother saying what had gone on and I put the TV on. It's just unbelievable."
Tickets are also on sale for shows in Brixton, Dublin and Glasgow, which will all take place in early June.