All grown up! Lauren Conrad has come a long way since her days as a realty-TV star on "Laguna Beach" and "The Hills." Catty fights with frenemies and constant relationship drama have become things of the past for the now super-successful fashion mogul and best-selling author, who recently got engaged to her love William Tell. Click through for highlights from L.C.'s candid interview on her relationship and more in the January issue of Cosmopolitan!