Channel 24 reports that Ariana Grande has canceled a Las Vegas concert days before New Year's Eve "due to unforeseeable health reasons". The pop singer was originally scheduled to perform at The Chelsea at The Cosmopolitan of Las Vegas on Saturday. The hotel announced on Friday that Grande will not perform. Ariana posted a note on Instagram Stories saying: "Vegas, I am currently working through some health issues and am beyond sorry I won't be able to see you this weekend.