Topshop has said it is "surprised and disappointed" by the High Court ruling, which found in favour of Rihanna, over t-shirts sold by the high-street chain bearing her image.
A statement from the retailer said: "We feel that the fact that Rihanna has shopped, worn and had a relationship with Topshop for several years appears to have been detrimental to our case.
"Our long-standing supplier of the t-shirt in issue, Knitmania, has worked with Topshop for a number of years and is an expert in the manufacture of fashion jersey with applied graphics, producing for many of the leading retailers on the UK high street.
"Having received their full indemnity and view that selling a product with an image of a famous star, such as Rihanna, is simply providing a fashion item, we felt comfortable selling this garment."
Billionaire retailer Sir Philip Green is on the verge of selling a significant chunk of his fashion brand Topshop to US investors.
The tycoon is in talks to offload a stake of up to 25% of Topman and Topshop in a deal which values the two chains at close to £1 billion, according to sources.
The buyer is understood to be one of the joint owners of American clothing business J Crew.
Sir Philip, whose family ranked 17th on the 2012 Sunday Times UK rich list with an estimated £3.3 billion fortune, took over the Arcadia Group in 2002.
As well as the Topshop and Topman brands, Arcadia also includes a number of other big high street names including BHS, Dorothy Perkins and Miss Selfridge. It is understood Arcadia's other brands will not be included in the deal.
The sale is yet to be finalised, but it is understood it could be announced in the next 24 to 48 hours.