Her onesie, of course!
After a fun-filled evening out at this year's awards, Jesy whipped off her heels and wriggled out of her sassy red number to get cosy in her one-piece. And by the sounds of it, she had been looking forward to doing so all night!
Taking to Instagram, Jesy - who is dating Rixton singer Jake Roche - shared a selfie while sporting her very comfy-looking star print onesie. Still rocking her war paint from her evening out, the singer grinned for the camera showing off her pearly whites and Hollywood red lips.
Alongside her photo, she wrote: "As much as I love to get glammed up and enjoy a night out there's nothing better than coming home [and] putting on [your] onsie!!!"
We know the feeling, Jesy!
Earlier that evening, Jesy had cut an incredibly elegant figure on the red carpet alongside her Little Mix bandmates Perrie Edwards, Jade Thirlwall and Leigh-Anne Pinnock.
Dressed to impress, the former X Factor star had her dream dress designed for her by Suzanne Neville - and it really was gorgeous. Jesy's red floor-length gown flaunted her figure perfectly, featuring a fishtail skirt and deeply low-cut strapless neckline.
While Perrie opted for a fitted velvet dress, Leigh-Anne stepped out in a sheer golden number and Jade stunned in a daring halter-neck dress with a full black skirt.
Despite not being nominated for an award this year, the girls still had the best seat in the house to watch the ceremony unfold.
Giving fans a glimpse at how Little Mix were spending their night at the awards, Jesy shared a photo of herself and her bandmates at their table.
Looking like they were having a lot of fun in the snap, the four girls can be seen cutely pulling faces for the camera - still managing to look just as good! Next to her picture, Jesy said: "I do love my ladies <3."
On the night, Little Mix enjoyed watching performances from Ed Sheeran, Sam Smith, Taylor Swift and Kanye West, who was introduced to the stage by none other than his wife Kim Kardashian!
Madonna closed the show this year with a performance of new single 'Living For Love'. Despite unfortunately taking a tumble on stage, Madge carried on like a true professional and has reassured fans she is "fine" following her fall.
The biggest winners on the night were Ed and Sam taking home two gongs each. Taylor, One Direction and Pharell Williams were among the rest of the winners.
For all the red carpet action at the Brits 2015 click here.
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