Go Media consistently provides some of the best stock art resources specifically for t-shirt designers.
Just recently, they introduced a package of blank GUY t-shirts for creating the type of stunning winning mock-ups you see popular artists using when showcasing their designs.
Now, they’ve introduced a version of the templates for the GIRLS:
Once you pick up a set, you should also check out their excellent tutorial on how to create photo-realistic t-shirt mockups.Popculturetees.com t-shirt blog. Also, look for new coupons, discounts, & promo codes!