Midway through the show, Ari teased a HUGE guest performer. The audience was FREAKING out, until she revealed it was David Foster. As in the 16-time Grammy winner and producer for countless music legends, including Whitney Houston, Celine Dion, and Josh Groban. BUT HE'S NOT A TEEN ICON. If anything, they might know him as the husband of one of the Real Housewives of Beverly Hills.
Grande covered Houston's "I Have Nothing" from The Bodyguard soundtrack. Most of the teens around us sat down at this point (really the only point in the concert where anyone sat down), but the ladies sitting behind us who were older than us were HERE. FOR. IT.