Carrie Underwood rocks the Carolina Country Music Fest despite rain.
Carrie Underwood slips onstage but continues to perform brilliantly.
Audience exclaims, "She fell!" as Underwood loses footing onstage.
Underwood finishes set in heavy storm, delights soaked fans.
Underwood shares video of rain-soaked performance, declares determination.
Underwood calls the rainy performance unforgettable despite the slip.
Recalling a severe fall in 2017, Underwood shows resilience.