Some of pop music's biggest stars are participating in the concert, which is set to take place June 4.
Superstars like Miley Cyrus, former One Direction singer Niall Horan, Justin Bieber, and Coldplay are all performing on the big day.
Those who attended Grande's concert on the night of the bombing have been invited to attend the star-studded event for free, according to BBC.
Tickets for the general public went on sale Thursday morning and sold out in lightening-quick time.
According to Fox News, fans managed to snap up all the tickets in just six minutes.
The ticket sales are supposed to solely benefit the victims of the attack and their families, but now some people are taking advantage.
Some online sellers looking to make a quick buck have placed the tickets for sale on eBay, marking them up by hundreds of dollars.
It's doubtful that money from the resale will go to those affected by the horrific attack.
And it appears that these sellers have plenty of customers. Grande fans flooded social media with requests to buy one of the exclusive tickets.
Some fans wrote on Twitter:
According to the Sun, eBay has confirmed it's performing “manual sweeps” to take down the scalpers' ticket listings as soon as they pop up on the site.
The website has also dealt with sellers who were promoting unofficial “benefit” merchandise, including T-shirts, that wasn't actually raising money for victims.
Regardless, the show has already raised thousands for those affected by the bombing.
Fans and stars alike will gather for the concert Sunday at the Emirates Old Trafford in Manchester.