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The tension around her decision had been building up since she was introduced at the end of the premiere episode in a shocking twist.
The marketing exec, 25, was sent in to stir up trouble in the villa and gets her shocking orders, receiving a text saying she would be the villa villain.
In Tuesday's episode, Love Island viewers watched as Chloe went on a solo date with all the boys as the other girls were stuck back at the villa.
She then spent her first full day at the villa chatting individually to all of the guys - with Aaron Francis catching her eye.
Chloe admitted "not getting a huge sexual attraction" of Hugo Hammond whom she mistakenly called 'Diego'.
In the Beach Hut, she confessed "I need to make the right decision for me" ahead of her announcement.
As they time drew closer for her to announce her choice, the Islanders were stumped as to who she was going to choose.
"We have no idea," admitted both Shannon and Kaz, while the boys agreed they couldn't figure it out either.
Narrator Iain Stirling commented: "the tension in the villa is electric," as viewers got excited.
Chloe addressed the Islanders, telling them "I've chosen this boy to couple up with because when I first saw him I thought he was absolutely gorgeous.
"Even though we've not spent much time together at all, the time we did spend, I thought was just so fab."
She continued: "I think the most important thing is that you made me feel really comfortable, which was number one thing going in.
"I'm just looking forward to getting to know you on a one to one basis. So the boy I'm looking forward to coupling up with is..."
But then the episode drew to a close with Chloe's choice not aired, but ITV2 teasing drama for tomorrow's episode, and fans were not happy.
"Why's #loveisland doing me like that i need to know who she picks," wrote one Twitter user.
Another added: "Come on man, it’s episode two! I don’t even know their names, I’m not invested enough for a cliffhanger yet."
And a third said: "How you telling me I spent my time watching Chloe interview each guy and I didn’t even see who she picked."
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The arrival of Chloe, who admitted having a fling with a married dad before joining Love Island was revealed at the end of last night's show.
When asked by ITV why she wanted to go on Love Island she said: "I’ve been in awful ‘situationships’ and stuff so I just thought, why not?!"
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Chloe said her friends describe her as "funny", revealing: "I’m always the funny one in a situation.
"I always try and make everyone laugh. Outgoing, I’m quite bubbly and always doing something."