Jordan Moore also fraudulently sold greyhound equipment and conned victims out of £5,000.
Swift’s team had flagged similarities between her trademark and the company’s contested design.
The total amount of the fraud was nearly £3,000 and involved 12 victims, Cardiff magistrates hear.
Denise Sides was selected from hundreds of applicants to take part in the Opalite video.
The video for Opalite was inspired by Norton's chat show, after Swift appeared on the sofa last year.
The 21-year-old could be jailed for up to 20 years over a plot to attack the US singer's concert in 2024.
Her team argued that a bedding firm's designs showed similarities to her trademarked signature.
The TV presenter talks about being in Swift's 'Opalite' music video.
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