Tralalalalala la la LA LA!
Looks like good use of the brush tool in Illustrator (if I'm not totally mistaken). I'd love to see this in color. :)
Yes indeed, it is illustrator. Now, if I can get over the idea that I will ruin it, I might try to color it in photoshop... :)
Nice composition. Go ahead and color it. No risk, no glory!
Hmm, truer words were never spoke. It shall be done.