If busted-AC-unit season already has you longing for winter, take heart. Stella McCartney is continuing her series of videos with artist Petra Cortright. (You can see the fruits of their two previous linkups here and here.) In “Snowy,” above, the artist cavorts with digital flakes. In “Dreamy,” below, she blows bubbles (echoes of the model antics at the designer’s playful presentations) while wearing McCartney’s Fur Free Fur collection. It’s all to celebrate McCartney’s pre-fall collection, in all its fuzzy glory. Brrr.