The CEO of Rap-A-Lot Records – who has been with the 31-year-old singer since 2010 – reportedly proposed before May, and they are said to fit perfectly with each other.
An insider told People magazine: “He’s a great match for her.”
Christina was previously married to music producer The-Dream – with whom she had a daughter Violet – before they split after rumours he had cheated on her.
While there had been speculation she was engaged to Jas earlier this year, the star had remained tight-lipped about the “rumour”.
She had said: “Well, there are rumours, but we’ll stick to it being a rumour.”
Christina also recently revealed she will not be returning to the next series of ‘The Voice’ USA as the show’s social media correspondent because she wants to focus on her music career.
She previously explained: “”I took a break this season so I can work on my music.
“I’ve watched so many of these artists up there performing, I get that envy.
“I want it to be me. It’s that time, and sometimes it takes a little sacrifice.”