much know what to expect. the crowds, the long lines and santa listening to christmas witches. but this becomes a caught on camera location for an ambush celebration. ♪ hey santa, santa ♪ i want to sit on you >> shoppers are about to witness a whole different kind of christmas carol. as hidden cameras are set up throughout the mall's atrium. ♪ you're never too old to sit on santa ♪ >> once the stage is set, people step out of the crowd once at a time and sing a verse in this jingle. >> you can keep your holly and your christmas tree, i want to