Reserve the date in the Rift Tour tab and play a game
The easiest challenge in the series. As you will have noticed, a new tab is visible in your menu, named Rift Tour. By going there, you will see that it is possible to reserve your place for one or more concerts, highlighting Ariana Grande, as the leaks predicted.
This challenge will ask you to pre-register for one or more dates, knowing that they are all on Paris time. Note that the reservation does not commit you to anything, nor does it guarantee your presence for the show. For this, you will have to come about thirty minutes before the event (compared to the time you have chosen) in order to have a chance to participate.
As for the concert in question, we will know more this August 2, as promised by Epic Games. Completing this challenge will allow you to recover the Cosmic Hugs loading screen.