Nicole Scherzinger has finally walked away from Lewis Hamilton, after becoming convinced that he has no plans to marry her.

According to a source, the 36-year-old former X Factor judge, who had been in an on off relationship with the F1 champ for 7 years, called it quits and is really heartbroken and upset, but it was really over this time, the Mirror reported.

The insider added that that though the pair was expected to get engaged soon, their time away from each other had torn them apart, and they had even had a series of Christmas rows.

Meanwhile, Lewis, 30, who won his second F1 title last year, is believed to be more focused towards his career, and his long-standing dream has been to win 3 world titles to emulate his hero Ayrton Senna.