Never let anyone tell you that all black is boring. Models Emily Ratajkowski and Kate Upton both embraced the sleek shade from head to toe at the Vince Camuto Holiday Dance Party in L.A. Tuesday night, and there was no battle for who wore it better — just a double dose of sophisticated sparkle. (And all the holiday-party style inspiration you’ll need.) Ratajkowski, who is notoriously not shy about showing off her killer physique, stunned in a dramatically plunging black shirt tucked snugly into curve-accentuating, high-waisted satin trousers. (Kate Hudson would approve. ...