The 'Insatiable' singer revealed last week that she and the NFL hunk called off their engagement and friends of the pair revealed while Jason wanted to marry before Nadine reunites with her Girls Aloud bandmates for a tour next year, the Northern Irish beauty wouldn't couldn't commit to a specific date.
A source told the Irish News of the World: "He was insisting they had to get married before she went back on tour. Then, he told her they had to set a date or split up. After that they decided to call it a day."
While Nadine, 25, has put on a brave face in New York where she is promoting her solo album, friends say she is heartbroken over the end of the relationship.
The source added: "Deep down she's really hurting and the partying is just for show.
"She's distraught because she still loves Jason, but she can't see any way back from here for their relationship."
When she revealed the split, Nadine vowed to remain friends with her 33-year-old ex, writing on twitter, "A few weeks ago Jason and I broke up. We are great friends and decided we are better this way. I'm in NYC working & I love all your support. (sic)".
