Jason Derulo has fired back at reports suggesting an unplanned pregnancy was behind his split from singer Jordin Sparks.

The R&B star has already dismissed rumours alleging "infidelity, cheating or deceit" prompted last week's (ends26Sep14) shock break-up, and now the Talk Dirty hitmaker is taking aim at gossips who have suggested the split was linked to baby news.

DeRulo called in to DJ Ryan Seacrest's U.S. radio show on Monday morning (29Sep14) to clear up the latest reports, and he told the host, "I'm not one to throw my business out on the street, but I thought it was important because things are getting a little out of hand. I'm seeing all kind of stories about somebody getting pregnant, infidelity, things like me calling it off because of me being too busy and because of my new-found success. So I thought it was important for me to call in and clear the air.

"In a nutshell, there was a lot of tension in the relationship for a lot of different reasons. Every relationship has ups and downs. There was a lot of pressures of marriage (sic). There was a lot of arguing and stuff like that that just weighed on our relationship over time.

"When you stop having more good times than bad times, it's time to call it quits. It becomes something that is unhealthy."

DeRulo admitted that he and his now-ex are not yet on speaking terms following the break-up, but he hopes they can move past that.

He added, "I wouldn't say (we're on) good terms. I'll be lying if I said that, but it's not a bad situation. There's no bad blood. We didn't end off on a weird way or a negative way. It's not like we're hitting each other up, like, 'Hey, what are you doing today?'"

And he revealed that the time the couple spent apart weighed heavily on himself and Sparks: "We think it may have weighed on her more than it weighed on me. Yeah, she got frustrated a lot. She was in that frustrated space a lot and I think part of that was part of my problem...

"Three years... (is a) very long time. I think sometimes you can be in a relationship so long, it becomes a part of your life and you feel like you're obligated. And when you start feeling obligated and you start feeling like it's something you have to do because it's necessary, like breathing, that's not a good situation either. It should be something different."

Meanwhile, Sparks has broken her silence over the split. She has released a philosophical statement that reads: "The funny thing is that I read this quote... yesterday and it said, 'When something unexpected happens in your life or you think something bad happens just say plot twist! and move on'."