The bubbly blonde looked stunning as she fronted Wednesday's show (June 24) alongside Phillip Schofield.
Before she went on air, Holly uploaded her daily #HWstyle shot.
She revealed she was wearing a yellow floral dress costing £221.25 by LK Bennett.
The brand is a favourite of the Duchess of Cambridge.
Many commented on the summery hue of the dress.
Others told Holly that her newly-straightened hair – which also looked noticeably longer – looked beautiful.
"Loving the longer hair," said one.
"Beautiful dress Holly," said another.
"Lovely colours," another commented.
What happened to your feet?
With Britain in the grip of a heatwave, others commented on the fact that Holly has clearly caught the sun.
And some eagle-eyed fans even claimed that something a little strange was going on with the This Morning star's feet.
"Have you perhaps been wearing flip flops?" asked one.
If you take a closer look at Holly's selfie, you'll see that her legs look pretty tanned.
Her feet, however, appear a few shades lighter.
"You've missed your toes," said another, referring to what could have been a fake tan fail.
"Need some colour on those toes," said another.
"What happened to your feet?" another asked.
Holly has said previously that she isn't a fake tan fan, but she does use leg make-up when she wears a skirt on the show.
Fake tan fail?
Speaking on This Morning, Holly's glow was previously pointed out.
She said: "This is a leg make-up which, to be honest, I will never wear in real-life but is more for the telly."
Holly added: "Everybody thinks I wear fake tan and I hate fake tan. I have never been able to get on with it. I’ve probably had three fake tans in my whole life."
Instead, the presenter wears leg make-up to even out her skin tone.
Although it appears she forgot to do her toes today!
She said: “If I’m wearing a skirt on This Morning, sometimes I put a bit on my legs just to even the tone out a little bit.”
On the subject of feet, Holly's shoes also seemed to be a bone of contention among her fans.
"Not those heels again," moaned one.
"Nice dress, change the shoes. You wear them every day," said another.
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