Nail-polish brand OPI has a viral hit in a video of a horse dancing with women, which references some of the brand's whimsically named polish colors. The video had been viewed more than 2 million times a week after its release, according to OPI. "We have to be realistic and acknowledge that the way young women communicate is through digital media and anything viral will do well for us," says OPI Artistic Director Suzi Weiss-Fischmann.