Now whilst we try as best we can to rock up to work in our bed clothes, we never go quite as far as wearing pyjamas to work (as we reckon we may get sent home with a detention).
Our very own Jessie J took things to new levels of comfort as she arrived at Capital Radio wearing a *ONESIE* pyjama ensemble.
Jessie looked pretty smug as she posed for paps looking as if she'd just rolled out of bed in the all-in-one checked affair which she teamed with Nike high-tops.
Meanwhile Bajan goddess Rihanna hit NYC in what also looked like something we'd laze around in bed wearing.
The 24-year-old took inspiration from the catwalks (because believe it or not PJs are hot right now) as she donned a satin shirt and trousers print combo.
She paired the cream and gold two-piece with tan sandals and lashings of pink lippy - but still looked like she'd be more at home on a duvet and pillow than at the swanky new opening of Jay-Z's club.
To Ri Ri's credi, she did undo most of the buttons on her top to give the baggy blouse a hint more sex appeal.
But let's face, it she was still hanging with the cool dudes of New York in all-but her nightie.
It's not the first time the 'Bad Girl' singer has gone for nightwear as daywear, as she previously wore a Japanese-style satin pair of PJs to promote her film Battleship.
But what do each girl's bedtime choices *really* say about them? Time for some science courtesy of Yahoo!'s Fashion Team who told us:
"It seems these celebs have taken the pyjama trend a tad too literally.
Jessie J looks like she's just rolled out of bed in her checked onesie (that definitely screams grandpa rather than sexy), although to give her credit where it's due - the checkered trend is something we saw all over the AW12 catwalks.
And Rihanna looks only marginally better in her silk, tie dye two-piece. She's sexed up the look (typical Riri) by only doing up one button to reveal a lacy bra underneath, whilst adding a slick of red lipstick and a statement necklace. Definitely shows she's a bit of a minx in the bedroom.
But maybe next time leave your pyjamas for the bedroom, ladies."