After two years of dating, Nick Jonas and Olivia Culpo have reportedly called it quits.

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On Tuesday, Hollywood Life reported that the hunky singer is a single man again due to some rough occurrences that allegedly happened in the relationship. According to the report, Culpo is on the (ironically) jealous side.

"It all started to go downhill after the Billboard Music Awards. It's actually quite ironic, but Olivia started to get increasingly jealous over the amount of girls who were hitting on Nick and it just got to be too much," a source said. "Ultimately, Nick ended it and broke up with her."

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As it turns out though, there was likely a lot more to it than just Culpo's feelings about other girls.

"Olivia is also busy with her own career right now, whereas she used to travel with him all the time everywhere, so differing schedules and distance also played a part in the breakup," the source said.

Us Weekly also reported that the pop star and Miss USA have ended their romance although an insider implied that the breakup may not last forever.

Last November, Jonas explained to talk show host Wendy Williams how he thought of the idea for the song "Jealous," which was inspired by Culpo.

"We went out one night and this guy was looking at her for a little too long," the singer said. "It was uncomfortable. I'm not a jealous person and this was an experience that I was one or two drinks in. I really got into it and then I decided to let me just process this a different way and go into the studio and write this song."