Yikes. One-time couple Jordin Sparks and Jason Derulo are speeding along the awkward highway.

On Thursday, Jordin stopped by New York's Power 105 "The Breakfast Club" show, where she divulged all the juicy details of her breakup from the "Talk Dirty" singer back in September.

There was one detail, in particular, that Jason had an issue with and that had to do with the BMW 7 that he apparently bought Jordin for Christmas one year; she now claims the car turned out to be a lease that she suddenly had to return!

"I didn't find out until I was driving home for Christmas, 'cause I was going to give the car back anyway and they [BMW] reached out and they said, 'I wonder on your intention on giving the car back,' " she recalled of the dealership asking her to return the leased car. "And I was like, 'OK, your timing is impeccable.' "

Shortly after, Derulo took to Instagram to refute Jordin's claims, sharing a photo of the vehicle bill of sale with the caption, "Women Lie, Men Lie, Numbers Don't Lie! #WhyLease #BreakfastClub."

This.is.awkward.

But wait, there's more. During the show, Jordin, who bought herself a Jeep after returning the Beamer, revealed so much more of what went down behind their breakup. And while Jason claimed that they "amicably split" after three years, it turns out they never really had that breakup talk. In fact, according to Jordin, the ex-pair haven't spoken since "everything went down."

"We had an argument ... I apologized," Jordin recalled on the radio. "I was like, 'That came out totally wrong.' Then it was just really awkward ... it was a family type thing ... just a normal, you're in a relationship for three years -- you start having these, whatever, it just got really awkward," she continued. "I apologized, whatever. I asked him if we were good and he's like, 'We're good.' So then I leave and he just doesn't call, but he helped me with my bag to the car and he kissed me. He told me he loved me and then didn't call."

She added, "I was like, What the f--?' I'm the type of person who needs communication. I'm like, 'We need to talk about this so we can move past it.' And he wasn't responding, so I stopped responding. So I was like, 'You need to come get your sh--.' So he got all of his stuff out of my house because he was living with me."

Despite all of that -- and Jordin saying that there was no truth to the claim she pressured Derulo to marry her -- the "No Air" singer said she still considers Jason a "great guy."

He did some stupid sh--, I can't hold it against him."

I have a feeling this one is a 'to be continued.' ...