It's an international mystery: How did a US family's Christmas card photo end up in the Czech Republic, splashed across a huge storefront advertisement? Danielle Smith said Wednesday that the photo taken of her family last year got sent to family and friends, and was posted on her blog and a few social networking sites. About 10 days ago, one of Smith's college friends was driving through Prague when he spotted their huge smiling faces in the window of a store specializing in Europeann food. He snapped a few pictures and sent them to a flabbergasted Smith. “It's a life-size picture in a grocery store window in Prague - my Christmas card photo!” said Smith. Mario Bertuccio, who owns the Grazie store in Prague, said the photo was from the Internet. He said he thought it was computer-generated. When told it was a real photo - of a real family - he said he started taking steps to remove it. “We'll be happy to write an e-mail with our apology,” said Bertuccio. Smith has gotten 180,000 hits to her Web site since she recently posted the story about the well-traveled snapshot.