Mariah Carey had a make-up artist on hand to touch her up while she was directing her holiday movie 'A Christmas Melody'.

Mariah Carey

Mariah Carey

The R&B superstar stepped behind the camera to make the festive film and she would often call over the make-up expert to beautify her even when she wasn't in front of the camera.

She told HELLO! magazine: "I'm still always going to be a diva in certain ways. I don't mean that in the bad sense of the word.

"I mean, like, if there's a make-up artist there and they don't mind touching me up while I'm directing..."

Although the 45-year-old singer ensured she looked flawless at all times, she didn't apply the same high standards to her fashion choices.

Mariah - who has twins Moroccan and Monroe, four, with ex-husband Nick Cannon and is dating billionaire James Packer - would often step on set in slippers for comfort.

Discussing the project, she said: "It's a new start for me really and I loved it.

"First of all, directing is less abusive to the feet because you don't have to wear high-heeled shoes. I put on slippers and it was cool.

"I really loved it because it was Christmas and I start getting into the holiday spirit early anyway."