It's been a very merry holiday season so far for Nick Cannon and Mariah Carrey, who touched down in Australia today. The couple stepped out of their private jet with twins Roc and Roe fresh off a lengthy flight from Aspen, CO. The Carey-Cannons are embarking on the second half of their family vacation after spending a week enjoying the snowy scenery in Colorado. Nick and Mariah shared a few adorable photos from their Christmas festivities, including Nick dressed up as Santa. This portion of their vacation will likely require fewer jackets, scarves, and sweaters for Nick, Mariah and the kids. Upon their arrival in Oz, the foursome were spotted boarding a beautiful luxury yacht anchored just off the Great Barrier Reef in Queensland.