The Hills Kristin Cavallari reveals son Jax's struggle with colic 10/29/2014 Kristin Cavallari has revealed her son Jax struggles with colic. Read More RELATED NEWS Kristin Cavallari debuts new 24-year-old boyfriend Mark EstesBrody Jenner and Tia Blanco welcome their first child'The Hills' alum Brody Jenner engaged to pregnant girlfriend Tiarah "Tia" Blanco TAGS: Kristin Cavallari Lauren Conrad Jay Cutler Wild Cherry
