Speaking in her column for The Sun, Katie said: "Mel B, C or D is one of the unluckiest women in showbiz.
"Not only does she have to sit next to the man-magnet that is Cheryl Fernandez Alonzo (or whatever the hell her name is), but she has to try and look pretty at the same time.
"Pictures of her in her swimmers are more frightening than flattering."
She added scathingly: "And when she opens that mouth of hers, Mel C or B or D has an accent rougher than a sandpaper dog."
KATIE HOPKINS RESPONDS TO HOLLY WILLOUGHBY'S 'GEOGRAPHICAL' BABY NAME
It's not the first time that Katie has compared Mel B to a dog; just a few weeks ago, while live-tweeting the X Factor, she said: "Am thinking Mel B or C sounds quite a lot like the Churchill dog.
"Oooooh yes."
While some of her followers praised her for her "banter", others slammed her for being cruel to the former Spice Girl.
One even added: "She may sound like a dog, you look like one! #woofwoof go chew your bone!"
KATIE HOPKINS TELLS SCHOOL CHILDREN: 'WE'RE NOT ALL EQUAL'
Somehow we doubt Mel B will be too upset by Katie's comments, as the former Spice Girl is brimming with self-confidence.
Just the other day she posted a photo of herself to Twitter, captioning it: "Walking out of a coffee shop, or onto the runway? #Fierce"
Amazing.