Careful not to compete with her dress — which also appears to be a subtle nod to the superhero's black-and-red suit — Gerstein painted Lively's nails in black ( Essie Licorice ), save for three of the nails painted in white (Essie Gel Couture in First Fitting, which launches in June). For some added sparkle, Lively told Gerstein to add Swarovski crystals to the X-force art on her left hand's index finger — an aesthetic choice she was adamant about. Unlike the vintage crystals Gerstein used for Lively's Met Gala look , these are tiny stones that accented the glitter flecks inside the red polish (Essie Toggle to the Top) used to paint the Deadpool heart on her right hand and face on her left.