Olivia Rodrigo appeared on Instagram with a new set ... added to this month's FireAid Benefit concert. They will take the stage at the Kia Forum and Intuit Dome in LA's Inglewood neighborhood ...

The 21-year-old was able to make a swift recovery. Within seconds she popped back on stage and didn't appear to be hurt. Rodrigo was able to laugh off the moment as she posted a video of the fall ...