As Season 5 kicks off, Lauren gets the ultimate surprise when Stephanie brings Heidi to her birthday party. Will realizing that their friendship may never be what it once was, as long as Spencer still is in the picture, keep Lauren and Heidi apart for good? Heidi thought Spencer was ready to grow up when he called off their quickie marriage to give her a dream wedding. But when a guys’ night out ends with Spencer hitting on a beautiful bartender and beating up his sister’s ex-boyfriend, Heidi must ask herself once and for all: is Spencer the guy who makes her happy, or simply the cause of all her problems?