You can decorate your Christmas tree with espresso martinis, thanks to Kahlúa and Wieden+Kennedy London’s limited-edition “Espressohoho Martini Bauble.” Even actress Salma Hayek got in on the action, building buzz on social media when she revealed the bauble version of her favorite cocktail. Air Canada Air Canada is one of the brands that can get closest to the North Pole. In a magical holiday spot from FCB, the airline spirits a couple of sisters up to the top of the globe to receive a magical potion from a certain jolly elf to…