Nancy Dell'Olio called Celebrity Big Brother "an incredible experience" after becoming the second housemate to be evicted.
Dell'Olio, who had a high-profile relationship with former England football coach Sven Goran-Eriksson, braved the cold in a revealing green dress.
In a surprise twist, Big Brother asked four housemates to give "killer nominations", with their selections facing eviction on Tuesday.
Angie Bowie took a long time to state her choice.
After Big Brother prompted her for a name, the former wife of the late David Bowie picked Strictly Come Dancing professional Kristina Rihanoff.
"I wasn't prepared for this, I'm sorry," she told the Russian-born dancer.
The Only Way Is Essex's Gemma Collins chose former EastEnders star John Partridge.
"I don't like what he did to Darren Day," she said.
Previously, Partridge had nominated Day to his face.
The soap actor had offered concern about Day's addiction issues as the reason for doing so, but the musical theatre star disagreed with the explanation.
Former Mr Ireland Jeremy McConnell plumped for American reality star Tiffany Pollard and Ex On The Beach's Megan McKenna selected ex-EastEnders actress Danniella Westbrook.
All four will now face the public vote.
During Dell'Olio's exit interview, she told presenter Emma Willis: "It was an incredible experience. I'm pleased that I did it."
She added: "It's a trauma to get inside the house and it's a little trauma to get out."
Dell'Olio, 54, admitted being cut off from the outside world was hard.
She endured 10 days of tears and tantrums before being voted out by the public.
"It feels like it's been three weeks, a month. Many things have happened in the house," she stated. "The worst is the beginning and then you adjust yourself."
Willis asked how she had managed to avoid so much of the strife inside the tense house.
"The only thing I can be is myself," she said.
Earlier in the highlights show broadcast on Channel 5, McKenna was called to the diary room and given a formal warning for unacceptable behaviour.
The 23 year old ranted and swore at housemates Partridge and Pollard, before having to be restrained by security guards.
She lost her temper over the issue of house cleanliness.