Katona told Now that Clancy must "be strong" and "move on" from Crouch.
She said: "Abbey Clancy looks like she will take back fiancé Peter Crouch. It's no good, she's got to be strong and move on."
However, she added that if Clancy is giving him a second chance, she should make sure that Crouch makes up for his behaviour.
Katona explained: "Hopefully she's giving him some grief and not letting him off lightly.
"If the rumours are true, he's been incredibly silly for doing this to such a lovely girl."