Here go those diva rumours again! Mariah Carey is accused of making ridiculous demands as she directs Lacey Chabert in a Hallmark Christmas movie 

Mariah Carey has been accused of acting like a diva as she directs Lacey Chabert in the upcoming Hallmark movie A Christmas Melody.

According to InTouch Weekly, the 45-year-old songstress has been taking naps so often that the crew has to schedule filming around them. And the girlfriend of James Packer has also allegedly asked for a private trailer just for her dog.

The beauty has for decades been plagued by rumours she's a diva, from barking orders at back-up singers to having a giant M on the floor of her Manhattan apartment.

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Those diva rumours are back: Mariah Carey has been accused by InTouch Weekly of being demanding on the set of her Hallmark movie A Christmas Melody, which she directs and which also stars Lacey Chabert; here the two are pictured on set in early October

Those diva rumours are back: Mariah Carey has been accused by InTouch Weekly of being demanding on the set of her Hallmark movie A Christmas Melody, which she directs and which also stars Lacey Chabert; here the two are pictured on set in early October

'Our day revolves around her nap schedule,' the source said.

'She's constantly napping and doesn't like to be woken up. That would be understandable if she were performing, but she's been driven to set every day and not doing much [physical] activity.'

Mariah reportedly insisted on a second fully furnished trailer on set for her dog, which had to come with no less than 10 humidifiers.

Both sides fo the camera: The 45-year-old  spends more time taking behind the scenes selfies than doing any directing, according to InTouch

Both sides fo the camera: The 45-year-old spends more time taking behind the scenes selfies than doing any directing, according to InTouch

Diva: The Dream Lover singer reportedly insisted on a second fully furnished trailer on set for her dog, which had to come with no less than ten humidifiers

Diva: The Dream Lover singer reportedly insisted on a second fully furnished trailer on set for her dog, which had to come with no less than ten humidifiers

'She also insists on having someone hold her drinks as she sips them on set,' the source said. 'She will only drink through a straw.'

Mariah also reportedly spends more time taking behind the scenes selfies than doing any directing.

'It's a major distraction. She spends an hour smiling for the camera while the cast and crew are waiting,' the insider added.

Beauty sleep: According to one insider, the cast and crew's day 'revolves around her nap schedule'; here she is seen again with Lacey

Beauty sleep: According to one insider, the cast and crew's day 'revolves around her nap schedule'; here she is seen again with Lacey

Priorities: The hitmaker's Instagram indeed is filled with a lot of behind the scenes pix

Priorities: The hitmaker's Instagram indeed is filled with a lot of behind the scenes pix

Mariah scary: Mariah's directorial debut, currently filming in Cincinnati, tells the story of a music teacher who helps a young girl who is new in town write a song for the community's Christmas show

Mariah scary: Mariah's directorial debut, currently filming in Cincinnati, tells the story of a music teacher who helps a young girl who is new in town write a song for the community's Christmas show

'Finding the right lip gloss seems more important to Mariah than directing this film.'

Mariah's directorial debut, currently filming in Cincinnati, tells the story of a music teacher who helps a young girl - who is new in town - write a song for the community's Christmas show.

Mean Girls star Chabert plays the lead role in the film, which premieres on Hallmark on December 19.

Maria is no stranger to film, having played the lead in 2001's Glitter, and appearing with Forest Whitaker in 2013's The Butler.

Coming soon: A Christmas Melody premieres on Hallmark on December 19

Coming soon: A Christmas Melody premieres on Hallmark on December 19

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