Last night, StyleCaster threw an all-out holiday rager at W.I.P. with Kid Cudi and some guy who looked a lot like Jared Leto, Mia Moretti and Caitlin Moe debuted their new single "So Beautiful" at Le Bain, Extremely Loud and Incredibly Close premiered, Diplo spun in Chelsea and so much more.  Last night's parties were all about the DJs. - - -