HOw do I DO THIS BOW????

It looks like Christina applied a fine black fondant string to the edges. Their website is www.creativecakedesignsnc.com. They are on Flickr, too: http://www.flickr.com/people/creativecakedesigns/

We normally print our bows. But you could also just draw the edges with an edible marker or airbrush it on as well.

Here is a tutorial http://cakefixation.blogspot.com/2012/05/how-to-make-multi-colored-loopy-bow.html If you want the black on it you have to wait til the loops dry and apply them (using a clay gun to make the black strings) then wait for 1 side to dry before applying the other side. Then you are ready to assemble the bow.