The 35-year-old took to Instagram to share a photo of her new look, and we almost didn't recognise her!
We're used to seeing Caz with her stunning bronde locks, so the platinum makeover came as a bit of a shock.
Unsurprisingly, the presenter looked as gorgeous as ever and compliments from fans poured in.
One wrote: "Wow… a stunning shot… beautiful in whatever shade xxx [sic]."
Another gushed: "Now that is one beautiful picture. Looking STUNNING [sic]."
But, while we love Caz as a blonde, it seems the hair overhaul was simply a wig for a photo shoot.
She later shared another snap, this time sporting her own locks and natural-looking makeup.
"Bloody el… Hair and make up by @gemflossy [sic],@ she wrote.
Is there any look Caroline can't pull off?