This'll get you in the mood for BB5 - it's a clip of one the adverts they've being showing on Channel 4.
http://www.thisisbigbrother.com/downloads
What a great theme tune!
We don't know what the HMs will be like when they get in front of the cameras. The producers are apparently notoriously bad at predicting who will get on with who in the house, and how they will act.