500 Days of Kristin, Day 324: New App Posts 13.64K Allie Jones 12/14/15 04:42PM Filed to: 500 days of kristin 500 days of kristin kristin cavallari app articles Kristin Cavallari has posted two new original articles on her app: “Quick & Easy Holiday Makeup Tricks” and “The Power of Rose.” This has been 500 Days of Kristin.[Photo via Getty]