WHO: Norwegian model-turned-blogger Hanneli Mustaparta
WHAT: The Vogue.com photographer chose a crimson Prabal Gurung gown with dramatic neckline and leather details. (The designer not only created her dress, but was also her date for the evening!) Hanneli added an Alexander Wang clutch and heels to complete her evening look.
WHERE: The street style darling was on-hand for "An Evening With Ralph Lauren" hosted By Oprah Winfrey in NYC on October 24th.
Meanwhile, check out the blogger's perfect fall look.
Check out previous Look of the Day photos in the slideshow below.