When it comes to live performances, anything can happen—and sometimes, the unexpected can create the most memorable moments. That was certainly the case for Tigirlily Gold when they were invited to sing the National Anthem at the Steelers vs. Broncos game in Denver last Sunday.

When the duo started singing, there was a technical issue with the microphone and no one could hear them. Instead of making the moment more awkward than it already was, the entire crowd of 76,000 started singing along. Eventually, the singers were handed a working microphone and they jumped back in with a perfect harmony and closed the song off strong. They posted the moment on social media, and captioned it, “When a technical difficulty turns into 76,000 people singing the National Anthem together.”

@tigirlilygold Thank you @Denver Broncos for having us today!!!! Will always remember this moment! 🇺🇸☺️ #nationalanthem #denver #denverbroncos #technicaldifficulties #homeopener ♬ original sound – Tigirlily Gold