If you've ever watched even one episode of Laguna Beach or The Hills, you'll know it's not a good idea to get on the bad side of Kristin Cavallari, though many have not taken this advice.
Now, the reality t.v. star has her own show, Very Cavallari that features her (ex) best friend Kelly Henderson, and it appears the two have had a major falling out that won't be repaired anytime soon.
Scandalously, it's been rumored that the reason for the falling out involved cheating accusations with Kristin's husband Jay Cutler. So, basically, don't mess with Kristin or her husband.