Kate Bosworth is Topshop's mystery girl You can download Hollywood star Kate Bosworth's version of 'Winter Wonderland', as performed in Topshop's Christmas campaign film, and help the shop and star get a Christmas number one. TelegraphPlayer_TMG9720643 Kate Bosworth has been unveiled as Topshop's mystery Christmas campaign star. The Hollywood actress stars as a sultry siren in The Fabulous Baker Boys -inspired film which has been directed by her fiancé, critically acclaimed director Michael Polish. This project brings together two important aspects of my life: cinema and fashion. I have always been a fan of the Topshop brand and it has been an honour to work with Sir Phillip and the team," said Bosworth. Bosworth performs a vampy rendition of festive tune 'Winter Wonderland' wearing a custom-made dress she created in collaboration with the Topshop design team. Both the dress and Bosworth's sparkly shoes will be available as special made-to-order items on topshop.com in conjunction with the new Topshop store opening in LA in February 2013, and all of the make-up used can be purchased on topshop.com right now. "I think Kate looks effortlessly cool in this film, her voice is spellbinding and I can imagine every girl will want to be wearing Topshop this Christmas when they see her performance," said Kate Phelan, creative director of Topshop. But Kate's clothes aren't the only pieces from the film up for grabs - you can download her version of 'Winter Wonderland' on iTunes - buy it here - Shazam and Spotify now and help Topshop achieve their goal of getting a Christmas number one. Who knew Kate Bosworth could sing?