Sales boss Eugene Culhane said Derbyshire company Pretty Polly is "delighted" that celebrities like Beyoncé and Rihanna wear the company's tights.
He said: "I think it's the result of a lot of hard work and a lot of time spent in the United States, getting our products onto celebrities, getting our products into the right retail environments, and spending a lot of time on social media."
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Hundreds of people turned out to open a cancer support centre in memory of fundraiser Harry Moseley. It would have been his 18th birthday.
Dry overnight with clear spells and a widespread frost.
Dry and frosty tonight, sunny intervals tomorrow but cold.