'Move' singer Jesy looked stunning in black shorts with a lace trim, which she teamed with a black crop top and suede knee-high boots.
The brunette joined Rixton star Jake in front of the mirror for a few selfies before admitting to her followers: "My valentine :) feel so lucky to have met this one, I'm so bloody in love and I want to shout it from the rooftops!!!!!"
Meanwhile, Jake made a rather surprising admission, revealing soon after: "Out for dinner with the lady. Yes I'm wearing her dress."
It seems Jesy was spoilt rotten on the day, as she also shared a photo of her Valentine's Day gifts, which included chocolate and roses. Aww!
Captioning the photo, she said: "My little <3 has melted!!!!"
X Factor star Jesy and Jake were first linked last September, with reports suggesting that they began dating after hanging out together at summer festivals.
Jake is the lead vocalist of pop band Rixton and he's also the son of Coleen Nolan and EastEnders actor Shane Richie.
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Watch Little Mix's video for 'Move' below: