Pop singer Oriana Sabiatini posed in a white top to her 3.9million followers on the social media site.
Inevitably the post, which has been liked by 263,000 people including Paulo, drew scores of United fans begging the couple to swap Turin for Manchester.
One wrote: “Come to Manchester United with Paulo.”
But his future remains in the balance after he liked a Juventus’ fan’s Instagram post begging the Argentinian to stay put.
The post read: “This is your destiny Paulo.
“It is already written in the stars Paulo, you can not leave us like this”
“Being the Juventus number 10, following in the footsteps of Alessandro Del Piero, wearing the captain’s armband in the future to become a legend like him.
“It is already written in the stars Paulo, you can not leave us like this.
“Contradict all these voices, please, stay with us. What is Juventus without his Joya?”
Paulo and Oriana hooked up over a year ago and have been completely smitten ever since.
They regularly shared love-up snaps on Instagram and are inseparable.
Oriana is a musician, actress and model.
Commenting on her romance with the forward, she previously said: “He is what I look for in a partner, someone that values me and respects me.
“When I like someone, I like to make them feel the same way. If I fall in love, I give everything of myself.
“It is very nice that someone makes you feel unique.”