Girl With A Funny T-shirt

By the time of the Great Depression, the T-shirt was often the default garment to be worn when doing farm or ranch chores, as well as other times when modesty called for a torso covering but conditions called for lightweight fabrics.
Following World War II, it became common to see veterans wearing their uniform trousers with their T-shirts as casual clothing, and they became even more popular after Marlon Brando wore one in A Streetcar Named Desire, finally achieving status as fashionable, stand-alone, outer-wear garments.
Beginning in the late 1960s, the T-shirt became a medium for wearable art. Psychedelic art poster designer Warren Dayton pioneered several political, protest, and pop-culture art T-shirts featuring images of Cesar Chavez, political cartoons, and other cultural icons in an article in the Los Angeles Times magazine in late 1969. Today, many notable and memorable T-shirts produced in the 1970s have now become ensconced in pop culture.
Examples include the bright yellow happy face T-shirts, The Rolling Stones tops with their "tongue and lips" logo, and the iconic "I ♥ N Y”.