I've just recently started watching this show, and I love it. Its just I'm a little confused about somethings. Heres a few questions

1. How old are the people in this show? Lauren in particular
2. Where does Lauren live? And where do Heidi and Spencer live?
3. I know the last season just finished, but when does the next season premiere? What day, what time and what station does it usually play on ?(Canada)

4. It's not a reality show, is it?
5. Which season is the best?