The former model, who presented Celebrity Love Island back in 2005, made the dig on her Heart Radio show, also bringing up Caroline’s rumoured romance with her ex-boyfriend Danny Cipriani.
Kelly said: “I can’t believe she’s doing Love Island and dating Danny Cipriani.
“I was like, ‘Is she just following my life or something?’. Hang on, I was the first host of Love Island, then I dated Danny. It’s like, what’s next?
“Is she going to come and start hosting this show next?”
She continued: “I don’t know if she’s still dating him. But when I look at stuff like that I’m like, ‘This is just weird. It’s just weird’.”
Kelly’s stint as the co-host of the original Love Island came to an end when she was dropped after just one season.
Fearne Cotton was then drafted in to present the second run alongside Patrick Kielty in 2006.
Caroline has been at the helm of the rebooted ITV2 version since its inception in 2015, where ratings have increased year-on-year.
In recent months, the former Xtra Factor host has been linked to rugby player Danny, who Kelly dated on-and-off between 2010 and 2013.
However, it was recently claimed Caroline had called off their short-lived romance having first been spotted together in April.
Love Island Contestants 2019
Yewande Biala(01 of12)
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Age: 23
From: Dublin, Ireland
Occupation: Scientist
She says: "I think people may be surprised. Every time I say that I’m a scientist, people are shocked. I think there are loads of intelligent people on reality television." (credit:ITV)
Lucie Donlan(02 of12)
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Age: 21
From: Newquay
Occupation: Surfer
She says: "I stand out and I’m different to the usual girls that might go on the show. I’m more into sports as well as being glam. I can do both, which makes me stand out compared to other girls. I’m more of a guy’s girl than a girl’s girl."
Claim to fame: "The last guy I was with was Charlie [Frederick] from last year’s Love Island. We got together a few weeks after he came out of the villa." (credit:ITV)
Amber Gill(03 of12)
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Age: 21
From: Newcastle
Occupation: Beauty therapist
She says: "I like tall guys who are muscly and athletic, I like people that go to the gym because that’s what I like. I want someone who is funny and that I can have fun with and doesn’t take themselves too seriously because I am daft."
Claim to fame: "I know a few of the former Islanders from Newcastle, like Adam Collard and Ellie Brown. Everyone knows everyone in Newcastle!" (credit:ITV)
Amy Hart(04 of12)
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Age: 26
From: Worthing, Sussex
Occupation: Cabin crew
She says: "I I have weird celebrity crushes like David Walliams and Simon Cowell. You’d never go there obviously but there is something about them."
Claim to fame: "I went on a night out once and Liam from One Direction was there. We were in the VIP bit and so was he and he walked past me and I smiled and he said ‘Hey, you alright? What’s your name?’ He told us to come and sit in his booth and we had a picture together." (credit:ITV)
Anna Vakili(05 of12)
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Age: 28
From: London
Occupation: Pharmacist
She says: "I’m difficult to handle, I’m a drama queen and I overreact. I’m clumsy and I’m a messy eater. I spill my drinks all the time. I’m stubborn as well, if I’m in a mood then it’s really hard to get me out of the mood."
Claim to fame: "I ended up on the Iranian News earlier this year when my sister and I were away in Qatar with two Iranian footballers who have a huge following. Suddenly my followers went up by 20,000 and I started being tagged in fan pages!" (credit:ITV)
Anton Danyluk(06 of12)
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Age: 24
From: Airdrie, Scotland
Occupation: Gym owner
He says: "That’s a medical condition that I have… a wandering eye! I’ve never really been loyal in any of my relationships. My last relationship, I actually got caught cheating for the first time in my life and it changed everything for me. I saw how much it hurt her and what it did to her. So, for me going to into Love Island, it’s going to be the biggest test of my life." (credit:ITV)
Tommy Fury(07 of12)
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Age: 20
From: Manchester
Occupation: Boxer
He says: "I won’t be afraid to go and have a splash about in the pool, I’ll mingle with people and find out about everyone because at the end of the day I’ll be living with these people for a long time so it’ll be nice to see if I have a bromance in there, along with a relationship. It’s nice to be a bit standoutish."
Claim to fame: "It’s probably my brother, Tyson, but I’m my own man and I’ve said it throughout my whole boxing career. I don’t want to be labelled as his little brother, I’m my own man and I’m doing the best that I can do in life and that’s all I’m setting out to achieve." (credit:ITV)
Joe Garratt(08 of12)
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Age: 22
From: South east London
Occupation: Catering company owner
He says: "I’ve only had one girlfriend. I knew her locally but I think we started chatting through social media. I meet people in bars, that’s my go-to."
Claim to fame: "I used to play semi-professional rugby." (credit:ITV)
Michael Griffiths(09 of12)
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Age: 27
From: Liverpool
Occupation: Firefighter
He says: "I get complimented on my smile a lot. People seem to be obsessed with my lips. I’d rate myself ten out of ten, I would have said nine but I’m a hero so it bumps it up." (credit:ITV)
Sherif Lanre(10 of12)
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Age: 20
From: London
Occupation: Chef and semi-pro rugby player
He says: "I’m upbeat and cheeky and outrageous with my own friends so hopefully that continues in the villa. I’m always on a mission to make people laugh.That’ll be of value in there." (credit:HuffPost UK)
Callum MacLeod(11 of12)
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Age: 28
From: South Wales
Occupation: Aircraft engineer
He says: "I would say my best feature is my tan - give me an hour and I am golden." (credit:ITV)
Curtis Pritchard(12 of12)
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Age: 23
From: Shropshire
Occupation: Ballroom and Latin dancer
He says: "I have lived a very sheltered life because of my dancing, I’ve not done a lot of going out partying, going on dates because I haven’t had time to. Being truthful I’ve probably been on less than ten dates, maybe five dates. I have never met anyone online, I’ve never used a dating app."
Claim to fame: "I would say my claim to fame is that I’m on Dancing with the Stars Ireland and AJ Pritchard from Strictly Come Dancing is my brother." (credit:ITV)