"The Hills" is an American reality series that originally followed the life of former "Laguna Beach" star Lauren Conrad and her friends in Los Angeles. Lauren moved to the region to pursue a career in the fashion industry. Her friends are Audrina Patridge, Whitney Port and Heidi Montag. Cameras follow their every move as they juggle work, rest and play. Lauren was replaced in the fifth season by another former "Laguna Beach" star, Kristin Cavallari. It premiered on MTV in 2006 and ran for six seasons.