The Take That star and Overs category mentor claimed that Maloney has responded far better than he would to harsh and unfair criticism.
"Chris is doing great. Sunday nights are supposed to be full of dread but he springs in and out of my dressing room. I'm so happy to see that he's enjoying himself," Barlow told the official X Factor website.
"He's had the most criticism out of everybody. I only know what I see. For me, he's really easy to work with. Whenever I'm around him, he's the loveliest, sweetest man ever."
Commenting on the hateful comments Maloney has had on Twitter and negative press stories that have been written about the reality TV hopeful, Barlow said: "I think he's managed it brilliantly. If these things were being said about me, I'd be cursing and lashing out.
"I really admire how he's taken the negative things being said about him in his stride. I really respect that."
The X Factor continues this weekend on ITV1.
Watch our interview with Christopher Maloney below: