My wife would lose her mind if ours doesn't end up being a girl. We have had 2 sonograms and one of the 3d ones, and all of them so far have shown girl. At least her room is yellow and baby blue, so if it's a boy, it shouldnt require too much reworking there! Plus her name would easily just go from Charlotte to Charlie.
The other fear my wife has right now is that there's a twin hiding in there somewhere lol. One of our friends was prepared for one, but there were two babies. The 2nd one was hiding directly behind the first for the entire pregnancy and was much smaller. They were prepared for a boy and got a boy and a girl!