I've never paid much attention to the theory that you should play Mozart for your baby while she's still in your belly. I try to talk to baby as much as I can, but I'm sure she hears me all day long and will know my voice. But something of this sort recently caught my eye.
This book, Oh, Baby the Places You'll Go! A Book to be Read in Utero is an adaptation from the works of Dr. Seuss and is meant to be read to the baby in your belly. It's a fun little book with mentions of several of Dr. Seuss' famous story characters. The theory is you read the rhythmic prose now and also read it once the baby is born. The sound of your voice and the familiar beat of the story will be familiar and hopefully calming to your baby.
Who knows if that's true, but regardless it's a fun book and is easy to read right to your belly. I usually read it in the morning time, once I feel that baby girl is awake. It's been fun since the book highlights your baby right in it's words. It would make a perfect little gift.