She lost out in the public vote to seven housemates, made up of Luke Scrase - who was last to secure safety - Ashleigh Hughes, Conor McIntyre, Deana Uppal, Luke Anderson, Sara McLean and Adam Kelly.
Caroline whooped with joy as her name was announced, running around and screaming: "Yes!"
Exiting to what Brian Dowling later called the most boos this series and "maybe ever", the contestant carried on celebrating in front of the baying crowd, waving her hairbrush in the air.
The former boarding school girl has antagonised people both inside and outside the house, most recently with her decision to purchase only sweets, chocolate and junk food with this week's luxury shopping budget.
She also caused a storm by seeming to call Luke A "Mrs" and by describing Adam as "a gorilla".
Caroline was not the bookmakers' favourite for eviction tonight, with Ashleigh having had odds of 11/8 to be axed.
Photo gallery - Big Brother day 51:
Copyright: Channel 5