What types of clothing should i wear for my PHOTO SHOOT for my HEAD SHOTS?

You may want to take some different outfits with you, as sometimes they may have you wear all or most of them. Anything that feels comfortable and looks like "you" is probably going to work; something that makes you look unique. Try dark wash jeans and some nicely-fitting solid color tops in fun colors (like coral or turquoise). I find that scoop-neck, not crewneck, tees look best on camera. Good luck!