UPDATE: It turns out viewers weren't collectively hallucinating -- Adele explained the sound issues via Twitter:

Some good did, thankfully, come of it:

Adele took the Grammys stage tonight (February 15) to sing the 25 track "All I Ask," but her performance was partially marred by technical difficulties.

After a brief introduction from co-writer Bruno Mars, Adele began, accompanied only by piano -- or so we thought. A persistent twang was soon noticeable, nearly louder than Adele's vocals, which also cut in and out throughout the performance. It's baffling, that the Grammys -- arguably music's biggest night -- could drop the ball so hard, sound-wise, on someone who is pretty much the music industry's most popular (aka best-selling) current-day artist.

Ever the consummate professional, however, Adele recovered fairly well, pushing through the sound issues with her soaring vocals, demonstrating why her latest album has sold over eight million copies so far.

Check out Adele's performance of "All I Ask" in the video above.

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