The R&B singer walked the red carpet for her new film Baggage Claim over the weekend and appeared to hint that Jas had popped the question by wearing a giant diamond rock on her ring finger.
When asked whether the engagement rumours were true though, Dancing With The Stars contestant Christina came over all coy.
Speaking to Necole Bitchie at the premiere, Christina said: "Maybe [I'm engaged]. I'm very happy, I'm in a good place."
Hmm. It sounds like she might want to keep her relationship status under wraps for now - but she still can't hide that massive ring!
While on the red carpet - for which she wore a sexy Tom Ford ensemble and debuted a new brown hairstyle - Christina also opened up about how Jas pursued her for two years before they began dating.
"He found me," she revealed. "Somehow I ended up meeting him but I was very mean at first, don't get it twisted. I was like, 'I am not feeling anybody, no thank you!'
"But after very long persistence, give it a couple of years of persistence, when that person is still there…Boy!"
The petite songstress was previously married to music producer The Dream, although they separated less than a year after eloping to Las Vegas. The former couple have a three-year-old daughter, Violet, together.
As well as enjoying a loved-up personal life and starring role in a new romantic comedy film, Christina is also having a lot of fun appearing on the current series of Dancing With The Stars.
This week she and dance partner Mark Ballas wowed the judges with their Charleston and breezed through to the next stage of the competition.
Do you think it sounds like Christina is engaged? Let us know below, as the best comment each week wins £50!