Carmen Ortega claims Jason Derulo cheated on Jordin Sparks, who he split with in late September after a three year relationship.
The model alleges she had an affair with the Talk Dirty singer while he was still engaged to Sparks.
Ortega, however, told Star Magazine that she was unaware of Derulo's relationship status and thought he was single during her fling with him.
The 30-year-old beauty told the publication she met the 25-year-old last summer at a Los Angeles recording studio.
'We dated for a month,' she claimed. 'We went out in public with friends a few times, so I assumed he didn’t have a girlfriend.'
Once she learned that Derulo was dating Sparks, Ortega claims to have taken swift action: 'I cut ties with him immediately.
'He tried telling me their relationship was strictly fueled by management teams.
He lied to me the entire time.'
Ortega has previously made similar assertions when she claimed in 2009 to have had an affair with Reggie Bush while he was still dating Kim Kardashian.
Meanwhile, Derulo recently told US Weekly: 'I spent three great years with Jordin and she is one of the most amazing people that I have ever met. But as in all relationships there are ups and downs and at this time we have decided to amicably part.'
He went on to insist: 'Infidelity, cheating or deceit played no part in our relationship or our break-up, and I hope that people respect our privacy as we move forward with our lives.'
But Jordin painted a different, much more heartbreaking picture on Friday afternoon.
The hitmaker tweeted the sad message, 'Don't cry because it's over, smile because it happened.'
After breakup reports initially started doing the rounds on Thursday morning, the 25-year-old singer confirmed the news during a radio interview with KDWB in Minneapolis that afternoon.
And while he admitted that the long-time couple have indeed parted ways, he insisted there is no bad blood between them.
'Everything is cool man. It's not a bad situation, it's not one of those kinds of things,' he said.
According to People, the couple ended their relationship after spending the past few weeks apart.
Jordin and Jason were last seen being affectionate with each other at the MTV Video Music Awards in Los Angeles on August 24.
'They were loving each other's company as they sat in the front row and danced together,' an eyewitness told the site.
They were also seen with their arms around each other on the red carpet.
But things looked off for the pair when Derulo partied with Jamie Foxx and Robin Thicke at his friend Richie Akiva's birthday party at 1OAK in Los Angeles on September 18. Jordin was nowhere in sight.
On September 14, Jordin posted a rather telling tweet as to her emotional state: 'Football is the only thing making me smile today. I don't feel like doing anything except laying down & zoning out. #oneofthosedays.'
The following day, she followed it up with the new that she had just written 'the saddest song of my life', tipping off followers that she may have split from the Talk Dirty singer.
On Wednesday, she tweeted: 'Stu. Di. O.' making it clear she was recording new music. She has yet to tweet about the split.
The split has certainly come as a shock to many, with the couple almost inseparable since going public with their romance in January 2012, having been together since September 2011.
While their relationship may have not gone the distance, E! Online reports that the decision to end things was 'mutual' and that they pair still 'care very deeply for each other and will remain in each other's lives as friends'.
|History: Carmen has previously claimed to have |
had affairs with other famous men in relationships
'It is about Jordin, actually,' he confirmed to E! News at the time. 'And it's talking about how amazing it will be when I get down on one knee and it will be the greatest moment of my life.
'You can't fake anything because true love is true love, and that's the basis of our relationship,' he gushed.