The four-time Big Brother housemate couldn't get enough of the ITV2 series, which finished last Monday night.
But Nikki says that Big Brother can never be beaten, even by Love Island.
"I don't think [Love Island] can kill Big Brother off. Big Brother was the first every reality show, but Love Island, I have to say I was addicted," Nikki said this week. "I spent two weeks in New York and I watched the whole thing on my phone, I didn't miss an episode, I was obsessed with the whole thing."
Speaking to the Daily Mirror newspaper, Nikki went on to say she was disappointed by Love Island's winners, Amber and Kem.
She said: "I wanted Chris [Hughes] and Olivia [Attwood] to win because they held that entire storyline down, I loved Chris, he was my ultimate winner. If Chris could have won with Camilla [Thurlow] that would have been a dream. Or Chris and Kem."
Nikki added: "I just loved it, I’m gutted it’s finished, now on my evenings I don’t know what to do with myself.
"I miss it so much already."
Meanwhile, Nikki said she was now looking forward to the start of Celebrity Big Brother next week.
She raved: "I’ve heard a couple rumours and they always pull it out the bag, the producers know what they’re doing and they know how to make a great show, I’m excited."
Celebrity Big Brother 2017 launches Tuesday, August 1 at 9PM.