Big Brother began the nominating process early, calling glamour model Nicola Tappenden to the Diary Room before 9am, with actor Stephen Baldwin being the last in, giving his votes at 1.40pm.
New housemate Ivana Trump - Donald Trump's millionaire ex-wife - who entered the house on Friday, was not eligible to nominate anyone, or be nominated.
Heidi, who served 21 months in jail for tax evasion in relation to running a prostitution ring, has made no secret of her desire to leave the house.
She said in the Diary Room that she did not feel comfortable, saying: "I think I'm ready to go home. I don't like the showering, I want my food, I want my things. I guess I'm not that tough."
She also told ex-Dynasty actress Stephanie Beacham and former Another Level singer Dane Bowers that she wanted to leave, and urged the others to nominate her to face the public vote.
Katia, who has embarked on a romance with Swedish music producer Jonas Altberg (known as Basshunter), has not won over footballer-turned-actor Vinnie Jones, who said: "I just blank her. I think it takes all her effort to put one foot in front of the other. She can't think of anything else."
Sovereign claimed Stephanie has been ignoring her because they are "worlds apart".
"She's quite well spoken, and quite lady. Then there's me - baseball cap, glasses - obviously look quite young. We haven't really spoken at all," she told Big Brother.