You’re allowed to be wrong. The band made the night, substantially better than any DJ I’ve seen (unless you count daft punk)
Our DJ pulled out the morning of, he got a sub who started playing dubstep halfway through, I had to have a chat to him!
I did a speech at our wedding, no more than a few minutes and had some campaigner heckle me. Still don't know who it was (though I have suspicions) but I stopped talking and was asking for who it was to own up, they did not, weak as piss!