Heidi Klum's model daughter Leni shops with boyfriend Aris Rachevsky

Kristin Cavallari Reunites With Heidi Montag for TikTok Dance as She Films 'The Hills: New Beginnings'

The Hills' Heidi Montag and Kristin Cavallari dance together for TikTok clip

Heidi Klum, Anna Wintour and Kate Hudson join forces for the Breast Cancer Research Foundation