Mytheresa hosted a cocktail party celebrating the launch of the Nicky Hilton for Rebecca Vallance Holiday Collection, held at the Bel Air residence of Rick and Kathy Hilton. The dress collection, marking Vallance's first collaboration with a design partner,

To walk into my party seeing all of my friends, women I admire wearing the collection, looking so beautiful, seeing how everyone styles it so differently, it’s a dream come true.” Nicky and Paris Hilton Keep Fire and Ice Streak Going in Coordinating Holiday Party Dresses and More Looks From the Nicky Hilton for Rebecca Vallance Holiday Collection Party Robert Pattinson,