The 27-year-old British songstress explained to Ellen that she immediately recognized that it was an issue with the microphone, but was unable to fix it in the moment.
Adele admitted earlier on Twitter that she treated herself to In-and-Out Burger as consolation for the less-than-stellar rendition as a result of technical difficulties.
However, she also revealed to Ellen that she was an emotional wreck on Tuesday, adding:
I cried pretty much all day yesterday. In fairness I would have cried if it went really well as well. If it was a stand out performance I would have cried as well. I always cry.