Demi Lovato and Simon Cowell
Demi Lovato claims Simon Cowell is very "humble".
The 'Heart Attack' singer was surprised at how normal and approachable the media mogul was when she first met him as a judge on 'The X Factor' USA last year.
She said: "I expected him to be a lot more intimidating. And I mean that in a humbling way, because when people think of Simon Cowell, they think like, 'Oh, the big boss, he's mean to people' or whatever, but he's super down-to-earth ... Actually I don't know about down-to-earth!
"He's pretty fancy, but he's a humble guy. When he walks in a room, it doesn't matter if you're the biggest celebrity or the biggest big-shot in the room, he'll treat you the same as the person who's coming into the room to bring you tea. I thought that was pretty cool."
Despite his lavish lifestyle and expensive habits - including insisting upon having black loo roll in his house and splurging £3000 a week on floral arrangements - Demi, 20, joked his wardrobe could use some updating.
She explained to heat magazine: "The jeans he wears are torn up at the bottom and you can tell that they're not brand new. So there are parts of him that are super-fancy and then other parts that are super down-to-earth."
The pair have build a friendship in spite of their age difference and often exchange text messages, with Demi revealing she even has a special nickname for Simon.
She laughed: "He calls me Gobby, and I guess that means that I talk a lot or something. I call him Grampa or Grandma."
Tagged in Demi Lovato Simon Cowell