Even the best singers can come up against sound problems -- just ask Adele.
The vocal powerhouse struggled through her performance at the Grammys as her audio malfunctioned while she was on stage. A CBS spokesperson confirmed there was a five-to-eight second technical issue with the broadcast and said it was out of the network's control.
Adele sang the song "All I Ask," co-written by Bruno Mars, with the simple accompaniment of a piano. But things went wrong very quickly as the sound cut out at the beginning of her performance. The audio flubs appeared to shake up the singer a bit, who looked confused at points during her performance.
The singer later explained on Twitter what the audio problem was: "The piano mics fell on to the piano strings, that's what the guitar sound was. It made it sound out of tune." She also wrote that she would be treating herself to fast food chain In-N-Out after the fiasco.
Fans and musicians alike took to social media to wonder what happened during the singer's performance; most were quick to blame the sound engineer. Even a few celebrities, like Jesse Tyler Ferguson and Piers Morgan, weighed in. "Parks and Recreation" actor Ben Schwartz joked that the off-rhythm "left shark" of Super Bowl XLIX fame was behind Adele's song.