Hot on the heels of Victoria Eisermann's departure, the bubbly 19-year-old student has joined the original housemates after defeating Bhavesh and Anthony in a public vote.
On being told that she had been voted in, she said: "I am in complete shock."
She was then let loose in the house, shouting "Come on you b**tards!" as she entered.
The new contestant ran screaming through the house and jumped into the pool in her evening dress.
Caroline Wharram then came to the side of the pool and said of the just-departed Victoria: "We just got rid of someone who was very annoying."
She added: "She had these silly viewpoints."
Becky is a self-confessed "nosy bitch" and promised before going in that she would get the housemates "ship shape". She has also said that she will be nominated for "farting and burping".
Watch Becky's exuberant entrance below: