The ad is unashamedly buoyant and is soundtracked by a new, upbeat single from Perry called 'Every Day is a Holiday'.
Perry dances her way through a Nutcracker-style cast of Christmas characters, including life-size candy sticks, over-sized gifts, baubles and elves, all variously kitted out in H&M's dedicated Happy and Merry range.
Perry also gets a topless love interest, as well as a crop of suitably ethnically diverse kids popping up through the ad.
Perry, in a behind-the-scenes video, describes the campaign as "very me" and "very jolly".
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