The star won the initial case in July 2013.
Singer Rihanna has won a legal battle against high street store Topshop over a T-shirt bearing her image.The Court of Appeal in London upheld a ban on the store selling a sleeveless T-shirt featuring a photo of the star without obtaining her permission.
In the first successful celebrity case of its kind, three appeal judges agreed marketing the item without Rihanna's approval amounted to "passing off".
In other words, the unauthorised image was damaging to Rihanna's brand.
The star sued Topshop's parent company Arcadia for $5m (£3.3m) back in 2013 over the T-shirts, which featured a photo taken during a video shoot in 2011.
In his ruling in July 2013, Mr Justice Birss found some buyers would have been deceived into buying the top because of a "false belief" it had been approved by the singer.
He said it was damaging to her "goodwill" and represented a loss of control over Rihanna's reputation in the "fashion sphere".
Topshop lawyers had urged the appeal judges - Lord Justice Richards, Lord Justice Kitchin and Lord Justice Underhill - to rule that Mr Justice Birss had misunderstood the law on celebrity merchandising.
Geoffrey Hobbs QC argued the court was dealing with a "decorated T-shirt" similar to merchandise featuring images of stars such as Elvis Presley, Jimi Hendrix and Prince.
Mr Hobbs suggested Rihanna was using the law wrongly to claim "only a celebrity may ever market his or her own character".
Topshop lawyers had previously argued there was "no intention to create an appearance of an endorsement or promotion".
All three judges unanimously dismissed the appeal.