PHOTOS: Kristin Cavallari Shows Off Her Hot Bikini Bod

Kristin Cavallari was a vision in yellow -- a yellow bikini that is -- during a backyard pool party in Los Angeles Friday.  Take a look at these great pictures on RadarOnline.com.

Kristin’s bikini of choice was a bright yellow lacey number, perfect for summer and her to-die-for figure.

Kristin has said she will probably not be returning to The Hills if the reality show is renewed for another season.  Among other things, she wants to write a book.  Paging Lauren Conrad!