The 'Thinking Out Loud' hitmaker and the 'A Sky Full Of Stars' singers have worked alongside the fashion retailer on the garments, which will exclusively be sold in the United States.
Ed said: ''I'm really excited to be a part of this exclusive line with H&M and Global Citizen to unite global citizens and get us a step closer to ending extreme poverty!''
Global Citizen - whose aim is to end extreme poverty by 2030 - are running the free-ticketed event in partnership with H&M.
The exclusive Global Citizen Festival t-shirts will be sold for $9.95 each with 25% of every sale donated to the organisation. By purchasing a t-shirt or another selected recycled garment in store, fans will have a chance to earn tickets to the festival.
Fans can also earn tickets by donating their used clothing at any H&M location from today (26.08.15) until September 17 so it can be recycled.