Léa Seydoux switches on Champs-Élysées Christmas lights as Paris launches festive seasonbr br Léa Seydoux launched the Christmas lights on the Champs Élysées, marking the start of Paris's festive season with a lively set by Canadian singer Charlotte Cardin.br br READ MORE : br Let the pictures do the talking: subscribe to No Comment br br No Comment is brought to you by euronews, the most watched news channel in Europe.