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The songstress took to Twitter to spill the details on what really went wrong while she sang "All I Ask" off of her hit album, 25.
"The piano mics fell on to the piano strings, that's what the guitar sound was," she explained.
"It made the sound out of tune. S--t happens."
But the live blunder wasn't exactly all bad, really.
Meanwhile, a spokesperson for CBS released the following statement following the singer's live bit.
"A CBS spokesperson confirmed there was a five-to-eight second technical issue with the broadcast, adding without elaboration that it was outside the network's control."
This story first appeared at EOnline.com.