The diva was performing Stronger on Tuesday's show when a particularly rough dance move caused the gurl's microphone pack to go flying off her body!
Brit was no longer connected - but strangely the vocals kept going as if NOTHING HAPPENED!
Britney adjusted her loose wires and didn't miss a beat, so the error might have gone unnoticed - if a fan hadn't been recording at that exact moment!
Ch-ch-check out the video (above) to see the technical glitch that may have exposed Britney's methods of perfection!
[Video via Sheldon Bruck/Instagram.]