I have seen other cards made with the Beautiful You stamp set where the stamp has been altered. I finally decided to give it a try. If it doesn't work, it's only paper and can be tossed. I don't think these are the best I can do, but I don't think they need to be trashed.
I only inked up the top part of the stamp, up to the waistline. For the blue dress, I drew a long skirt on a scrap piece of cardstock. Using a blue Stampin' Up! watercolor pencil, I traced the pattern on to the card. I then used the blue pencil and a blender pen to make the dress.
For the pink dress, I also used Stampin' Up! watercolor pencils, but I did not use a pattern. I just made some squiggly lines to make the dress. Once again, I used a blender pen to fill in between the squigglies.
To dress it up a little, I used Wink of Stella on the top of the dress.