Popstar Lily Allen had suggested that the programme was "verging on child cruelty", while members of the public also complained to Ofcom after ten-year-old contestants Natalie Okri and Hollie Steel were reduced to tears during the show.
Carr told London Lite: "It's just not fair on the children who are competing. I remember the singer, Natalie, who burst into tears when she lost. It was heartbreaking."
Judge Piers Morgan has rejected complaints against the show as "ridiculous", arguing that "kids cry" when they get nervous.