Elettra WiedemannOne Direction Brooke DanielsonKeltie Knight

From transitional army jackets, to matching separates, to one good looking boy band, it was a night of fashion hits in NYC on Monday. The week kicked off with a suave-looking One Direction at their NYC movie premiere, some laidback looks at the Glamour.com and Tumblr summer celebration, and so much more. Click through to see the 10 best dressed from all of yesterday evening's festivities.