Carlie Wong. Photo by Mike Campbell. It only takes three to make a trend, so when we spotted that third pair of Converse (yes, sneakers) in the tents yesterday, we knew exhaustion was en vogue. Hump day at L'Oreal Fashion Week had us practically mainlining caffeine to fend off fashion fatigue. By evening, even the most eagle-eyed weight watchers were too tired to resist sugar-high slices of tiramisu cake in the media lounge. One......