Britney Spears takes a portable dentist chair everywhere.
The 30-year-old singer has the reclining furniture flown by private jet to the 'X Factor' auditions so she can relax in comfort while her fellow judges Simon Cowell, Demi Lovato and L.A. Reid are forced to sit in fold-out directors' chairs.
A source told The Sun newspaper: ''She's got a portable dental chair and she loves it. It reclines so she can relax while they make her up.
''We joke with her about it all the time. It's a running joke amongst her whole team.
''We make sure it's in every city she goes for the auditions - and it always travels by private jet.''
Despite her attention-grabbing chair, Simon insists Britney is very ''shy''.
He told People: ''She's not on the show to be Britney Spears on a TV show.
''She's actually there to prove to the world there's more to her, and she's got the ability to do this job really well. She's taken the role really seriously.
''It's quite interesting because when someone has done what she's done as she has with her career, and being such a public person, you kind of think she is going to be very confident, but in real life she's shy. There's kind of a mystique about her which I think is what kind of attracted me to her in the place.''