Mariah Carey took to her Twitter last night to explain away her less-than-stellar performance at Michael Jackson’s memorial service. Apparently, seeing the casket was the thing that did her in. According to Mariah,

Trying to sing today was basically impossible for me. I could barely keep myself from crying. I’m sorry that I wasn’t able to pull it together and really do it right, but I was literally choked up when I saw him there in front of me.

Caskets can be so distracting.