I found this tutorial on a friends website- Sew Like My Mom. It was super easy and baby bug wears them all the time! I found the diaper cover tutorial here.
The next dresses I made I used a pattern for. The pattern was New Look 6688. I had to change it a little. The pattern had the zipper under the arm. I tried the bodice cut that way and I couldn't get the silly thing over her head! I changed it a bit and put the zipper in the back. The purple one was my first attempt. Then I did the rose ones for baby bug and her cousin. The diaper cover was from the same tutorial as above, I just added some lace to the butt to make it a little cuter.