Shares in French appliances group Seb soared on Tuesday after US television personality Oprah Winfrey told her millions of Twitter followers its low-oil fryer had "changed my life".
Seb stocks were up 4.05 percent to 62.42 euros in midday trading on the Paris stock exchange, hitting a six-month high.
Winfrey had Tweeted on Friday about using the company's T-Fal Actifry, a low-oil fryer which went on the market in the United States in 2011.
"This machine...T-Fal actifry has changed my life. And they're not paying me to say it," Winfrey wrote to her more than 16 million followers, posting a picture of herself holding the contraption.
She later posted a photograph of French fries made with the machine, saying they were "delicious with my veggie burger."
Winfrey is one of the most influential celebrities in the United States and her endorsement of a product can have a significant impact on its sales.