As WWD reports, "last November, Topshop appealed a decision by a judge at Her Majesty's High Court in London prohibiting the retailer from selling T-shirts featuring a particular image of Rihanna."
Other interesting observations: what British law calls "passing off" U.S. law calls "trademark infringement." And apparently, Topshop failingly argued that it had the right to pass off Rihanna's image arguing that it had used the likes of famous artists before.