Pia let her 737,000 followers know she was listening to, and loving, Khalid's track Right Back, from his Free Spirit album.
Fans have questioned Pia and Tyson's relationship status since January, after the film producer had gone MIA on her Instagram account.
But just a short time later, they were seen soaking up the summer weather at a Sydney swimming spot.
The last post featuring Tyson was posted in September 2018, while he's believed to have deleted his account.
According to the Daily Telegraph, the genetically-blessed pair "recently moved out of their shared home" but remain "close friends."