Dan Walker
"I hope my boss would have dragged me off set".
"When coming on to give an expert opinion, titles matter."
The Apprentice star told the BBC Breakfast presenter to "mind your own bloody business" after he had another pop at the GMB host.
The Good Morning Britain presenter later insisted that his BBC rival shouldn't be "playing Billy Big Balls".
The two breakfast show presenters have a long-standing rivalry.
Things became heated between the rival presenters after the BBC Breakfast host spoke to the health secretary.
Earlier this week, the BBC Breakfast star raised eyebrows with a tweet seemingly taking aim at Piers.
Many stars publicly supported Naga after the broadcaster ruled she'd broken editorial guidelines.
Presenter Dan Walker has insisted there was nothing "gossipy" about the interview.
The rapper had to follow his own advice and Own It during the interview.