. >> reporter: why should the guys pick you on britt sglit comes down to their taste or type.e're two different people. >> if you are on a fence if, you have to put a roetdsse in the bucket and walk away. >> reporter: after 13 years on the air the show is on fire. a varietiable cultural phenomenon. >> the genius of the show is you get to sit on the uncouch with your pint of chunky monkey and judge. >> what does it say about us that we are so in to it and judge. >> what. >> love. >> >> rare peek in to the production process that is usually shrouded in complete secrecy. >> this is night one. we are about to get yelled out because we are walking through rehearsal. this is our fake bachelorette and bachelor. >> they are the standsome in. >> the camera. two dozen people behind the cameras. >> in case you forget your name. it is on prompter. >> i'm chris harrison welcome to a new season of bachelorette. >> i feel privileged. >> the iconic mansion is transformed in to a hollywood set. >> i heard they redesign the house every season. >> we bring all of this in. the flowers -- if you c