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Lloyd may want to add a little pine tar to his dancing shoes ... because he straight-up slipped mid-show and nearly smacked his chin on the unforgiving stage!

The R&B singer was performing down in Alabama Friday night ... and, while his backup singers hyped him up to begin his song "Girls Around the World," Lloyd -- dressed in a bright yellow suit -- showed off his fancy feet.

Check out the clip ... Lloyd's spinning in circles, kicking up his feet and he slides his left heel behind his right right before one of his bandmates shouts out "Talk to them, Lloyd!"

Lloyd tries to propel himself forward, but his left foot gets too close to his right ... and, he trips -- falling straight into the microphone and bringing it down with him.

Thank

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