There's something in the air (guitar)

Housemates spent the day speculating over the possibility of a new housemate - Dennis was removed on Friday, and Sylvia got the boot, so the numbers are down now... and when Big Brother gathered everyone together in the living room, the majority assumed someone new would be walking in...

There was no new housemate.
For no particular reason, Big Brother simply wanted to see the housemates air-guitar, and played loud rock music into the house for that very reason...