CBB5

[\PJ/]

When davina was doing the CBB5 house tour she pointed out as line in the wall and she said the public could send in questions threw to it, but it wasn't used well i did'n't see it used can somone help with this.
http://www.youtube.com/watch?v=aAXJ7Xvw1xQ

[Kevin]

It was only used once, to what I can remember near to the end of the series?