The Grammys have some 'splaning to do!

After a series of major musical snafus, National Academy of Recording Arts and Sciences (NARAS) president Neil Portnow explained what happened backstage at the Staples Center last night. Portnow explained what sunk Adele's performance of "All I Ask" during the live broadcast of the Grammys last night -- and it sounds like epic was fail was the fault of technical difficulties.

Portnow explained, "[The show has] over 20 performances, each performance is a complete set change," said Portnow of Adele's marred "All I Ask" performance. "We change over the microphones, wires. If you’ve been backstage, I can't tell you how we get it done, but we do. So, my understanding of what happened in that performance was, that’s a piano that gets loaded up on that center round stage. In the piano, are microphones, or a microphone, which is how that all gets taken care of. My understanding is that, just like this kind of microphone, something like that happened, the microphone dropped into the strings. You’ve seen the inside of a piano. You could actually hear it in the control room."

Yeah -- it was all sorts of not good. The big-voiced singer seemed to oversing the song as a result of the problems and the whole thing was just bad bad bad.

Portnow praised Adele for carrying on, saying, "All credit to her for the professional that she is. The show must go on. She did a great job. We certainly don’t like when those things happen, but those things happen sometimes."

Those things happened a few more times than we would have liked last night!

The crestfallen singer also tweeted about her disappointing Grammy performance, "The piano mics fell on the piano strings, that's what the guitar sound was. It made it sound out of tune. S--t happens. I'm treating myself to an in n out. So maybe it was worth it."

We gotta give it to Adele to make a joke about the night's most dissatisfying song -- she's got a great attitude. We'd be PISSED!

Meanwhile, Portnow also revealed why Rihanna dropped out of the Grammys at the last minute.

Portnow revealed, "I guess it was about 4:15 or so, we got word from her folks which basically said she had been under the care of a doctor. I guess she had been taking some antibiotics, some of you guys have had that stuff that’s going around, right? And she made the rehearsal, which was OK. She wasn’t feeling that great."

Portnow elaborated, "Doctor came in, examined her and said look, you have to be on at least 48 hours rest. You’re at risk here if you’re going to sing. Now, we all know we’ve seen this with other artists. How many other, whether it’s John Mayer who had this problem, Adele had the problem. This happens with singers. So, if you’re a singer and you have a problem like that, and the doctor says, don’t, if you’re smart, you don’t. So, we regret that. Of course we were all looking forward to that performance. She regrets it. She’d rather be singing than home in bed taking some medication. That’s what happens with live events. So we miss having her there. Hopefully next time around."

Hopefully next time they won't mess up so bad!