Did you know that T-shirts were once worn as an undergarment? Well, it is definitely hard to believe because now it has become the requirement of every wardrobe. The credit goes to the US navy, or we probably never would have had to wear this piece of garment. T-shirts have also become a grand source of expressing yourself. In this post, we have revealed 40 photos of some of the most creative t-shirt designs. These are one of a kind of t-shirts that should be added to the wardrobe of all fashion lovers.