Snapchat is feeling the effects of an offensive ad featuring pop star Rihanna. The ad, which was placed by a mobile-gaming company, asked users to decide whether they would rather slap Rihanna or punch Chris Brown. Snapchat pulled the ad following backlash online and apologized saying it was a mistake. Rihanna then responded via Instagram, accusing the app of spending money on something that makes a joke of domestic violence and shames victims. Following her post, Snap Inc's stock tumbled nearly four-percent for the day wiping almost one-billion dollars off its value.