Grace is the overwhelming favourite to be kicked out of the house, having proved massively unpopular with viewers. On Friday's show, where transvestite Sam was evicted, the crowd outside chanted "get Grace out" over and over.
Suzie also entered the house on Friday's show. She was one of 34 Kit Kat Golden Ticket holders to make it onto the show and was then chosen by the housemates, who were given a lottery ball machine.
There has been some speculation in the tabloids that Suzie, who has tried out for 'Big Brother' before and was a guinea pig in the house on another occasion, was a fix although Channel 4 has denied this.
The twist was that this week only Suzie would nominate, although she was not told this by Big Brother.
This afternoon, when Susie was called into the Diary Room to make her nominations she was told that her Golden status meant she was to be the first housemate to cast their vote, but she soon discovered that she was actually the only housemate to nominate.
Grace and Nikki, who beat eviction last week, now face the public vote on Friday.
On hearing the news, Grace assured the others that she was fine. "I knew, it's fine, it's cool. I knew it was coming." Nikki smiled and hugged the others.
Susie said: "I'm really sorry folks... Honestly it was the hardest thing I had to do, really hard. I do feel really dreadful. All of us were getting on too well."
Darren Haines, spokesman for Paddy Power, said: "Friday's show suggested the public are baying for Grace's blood. She's a whopping 100/1 to win the show so it would be one of the biggest upsets of all time were she to survive."
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