[user104658]

Originally Posted by Swan

You know on occasion BB would show HM's big events, or at least tell them, on the outside world. I wonder if they were shown the launch live in the house or something, and was hoping to get some content out it?! But with all the backlash and it being universally panned, they decided against airing what the HM's said about it?!

I doubt it, but it's a theory i guess.

Whoever he was talking to didn't seem to know about it, though.

It seems most likely that he's read about it being planned in passing before going in and possibly didn't even realise that it hadn't already happened... just remembered reading something about "Katy Perry going to space".