The Weeknd had Friday and Saturday concerts at SoFi Stadium in Inglewood, CA. He got through the Friday concert normally, but just 4 songs into the Saturday concert, he didn't appear on stage, and then showed up to announce that the concert was over.
It turned out that he blew out his voice while "yelling" during the previous song, and couldn't continue. He told everyone they would "get their money back", but it's not clear what that looks like.
A PFA listener was at the concert, and told me they had not yet been contacted by TicketDisaster regarding any kind of refund.
SoFi Stadium, located at the former Hollywood Park Racetrack site, is where the Rams and Chargers play. It has 70,000 seats, and is mostly located underground, due to height restrictions because of its proximity to Los Angeles International Airport.