He's X Factor's main man but what is working with Simon Cowell really like?
This year Simon is in charge of the girls category for the first time ever.
Last Saturday we saw him pick his final three with Sam Lavery, Emily Middlemas and Gifty Louise in the live show.
And they've now spilled on having Simon as their mentor.
Emily, for one, just can't get enough of the music mogul, enthusing: "He's actually one of the nicest people ever.
"He's so down to earth and genuine and he really does care about every single one of us. After we got the results [at judges' houses], he sat us all down and told us we have to put our health first, we have to eat, we have to stay healthy and get enough sleep. He's a nice guy."
She added: "He's so nice, I didn't expect that you wouldn't think he's actually talk to you."
Meanwhile Sam admitted to having a weird crush on Simon.
"I sometimes find myself staring at him and I'm like 'No, zone back in!'" she said.
And Gifty concluded: "I feel like out of all the judges he's the one to have, he's the main, original one. You want the boss himself."
The X Factor 2016 airs live tonight at 8PM on ITV.