Article continues below advertisementHeidi Klum turned up the heat again after sharing a sun-kissed, topless moment with her fans.The 51-year-old supermodel - who's spent more than three decades in front of the camera and remains one of Instagram's most confident bikini-loving stars - posted a peaceful outdoor clip that instantly grabbed attention.Article continues below advertisementArticle continues below advertisementSource: @heidiklum/InstagramHeidi Klum shared a topless sunbathing video on Instagram.