It doesn't matter if it's the middle of the night. Paris Hilton will wear sunglasses anyway. If she's gonna mix it up like that, she should try something interesting. Like play football in a bikini or walk into a snowstorm naked. Those would both have violent, yet interesting, results.
In case you care where these pictures were shot, the ones with the retarded sunglasses are near an Armani shop and the normal ones are of her leaving Ivy restaurant after having a filling meal of 3 crutons and a glass of water, no lemon.