The model and former Miss Great Britain, 31, posted the snap on Saturday (7 February) and some of her 235,000 fans were quick to comment on her figure.
In the photo, Danielle is wearing a skimpy lace bra and briefs.
The mum-of-three wrote: "Thanks to @rockboxboutique for my gorgeous new underwear set."
But it seems many of her fans weren't just looking at the lingerie... Instead, they began to comment on Danielle's slender frame.
Some described her as "beautiful" and "amazing", while another gushed: "Great figure."
But others told Danielle she is "too skinny", "thin" and "needs to get some curves".
It's not the first time gym bunny Danielle - who recently told fans she'd bought a waist trainer - has attracted criticism for her weight.
After Christmas, Danielle was forced to defend herself when she'd joked that she'd gained three pounds over the festive period.
The former CBB and Splash star now juggles her career with raising her three sons.
She has divorced footballer husband Jamie O'Hara after discovering he had cheated on her.
Danielle recently took part in ITV entertainment show, Get Your Act Together.
She faced her fear of heights to become an acrobat.
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