She was an instant hit with fans and made ratings soar, but it was only a one-off stint.
Ant returned to this year's series with Dec and many viewers were over the moon.
Normally a big fan of Ant and Dec on Celebrity but I really miss Holly.
However, some have admitted they preferred the show when Holly was hosting and have shared their thoughts on Twitter.
One person said: "I’m saying it. Holly was better last year with Dec than Ant & Dec this year."
Another wrote: "I love #ImACeleb although I do have to mute it when #antanddec are on. Bring back Holly!"
A third added: "Normally a big fan of Ant and Dec on Celebrity but I really miss Holly, @hollywills at least she had compassion."
I’m saying it. Holly was better last year with Dec than Ant & Dec this year. #imaceleb
— Lisa Boyle (@Li_Bo_X) November 20, 2019
— timbevan-19DESIGN (@timobevan) November 20, 2019
— Samantha Searle (@sammiedance) November 19, 2019
#ImACeleb bring back Holly!
— Azher Ayub (@az10k) November 19, 2019
However, others weren't thrilled that Ant and Dec are back together.
One person said: "I'm so glad @antanddec are back together. I loved Holly but #ImACeleb just isn't I'm a celeb with out them together."
Another wrote: "I love Holly and she did great but... Ant and Dec together are just another level aren't they."
— Sarah (@_SarahGeorgina) November 19, 2019
I love Holly and she did great but.....
Ant and Dec together are just another level arent they 🤣🤣 #ImACeleb
— Stace (@stokie_stace) November 19, 2019
Last year's launch episode drew in 11.6 million in the overnight ratings.
It was the most-watched launch since 2013.
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