Boyz II Men: We're not scared of Cowell
The R'n'B group, comprising Nathan Morris, Shawn Stockman and Wanya Morris, will be the next stars to appear on the show as guides for the contestants in a Motown special.
Nathan Morris told Ikonz magazine: "I like Simon. I think he’s very honest and straightforward about how he feels and I think if a lot of people were more honest in life, things would go a lot smoother.
"Sometimes he comes out kind of harsh, but Simon has a little way of twisting it just a bit to add his little personality onto the honesty. But he’s very straightforward with the auditions and what he thinks about their music and if people were more honest with auditions, we wouldn’t have bad music."
But the group revealed that they would show more tact than the harsh judge. Morris told the Daily Record: "I don't think anyone can be as bad as Simon. He's the high school definition of bad.
"I can't say I'll be nice to the acts but we are going to be honest."
He also told Ikonz that they are excited to just be back in the UK, saying: "We’ve been wanting to come back to the UK for a very long time and we’re just happy our fans are still there and wanna hear from us.
"We’ve been out of the marketplace for quite some time and we’re sorry for that and we don’t wanna do that again."
The group has sold 60 million records and broke the record for having the longest run for a single at the top of the US Billboard chart.