The Wonderwall hitmaker recruited acts for a week of shows benefiting The Teenage Cancer Trust at the Royal Albert Hall, which wrap up on Monday night (25Mar13).
Gallagher revealed he had approached Sheeran and folk stars Mumford & Sons to play, but accused them of changing their minds at the last minute.
The rocker ranted, "Everybody says yes to your face. Everybody. And then the agent will call, and their management will call and then their Pr will call and say, 'Ah, they're going to be in Australia at the time.' Really? Well, they never said that to me."
Now Sheeran has come forward to explain why he initially agreed to do the concert before backing out, explaining he thought it was the polite thing to do.
He tells Britain's The Sun, "I'd love to do it next year. I actually told him I would do the gig whenever he wanted, but the week they were planned I was in Australia with gigs already booked and sold out.
"Had it been any other time I would have made it happen but I found this out after I'd said yes. I think it would be worse saying no instantly without knowing, to be honest, and I said any other time he wants to do a show and I'm not on tour, I will 100 per cent do it."