500 Days of Kristin, Day 500: Dunzo 125.55K Allie Jones 03/15/16 12:00PM Filed to: 500 days of kristin 500 days of kristin kristin cavallari the end bye day 500 Former Laguna Beach star Kristin Cavallari’s debut book Balancing in Heels comes out today. Don’t buy it. This has been 500 Days of Kristin.[Photo via Getty]