Just weeks after they frolicked on a beach in the Maldives, X Factor judge Tulisa Contostavlos has reportedly called time on her relationship with her beau, N-Dubz bandmate Fazer Rawson .

The pop star couple, who have known each other since they were 11, started dating discreetly 18 months ago and only went public with their relationship in September last year.

Despite Fazer, 24, gushing about wanting kids with Tulisa in November 2011, it all seems to have gone sour.

According to reports, the pair's relationship hit rock bottom after a series of blazing rows and bust-ups over Fazer's constant partying.

A source close to the 23-year-old singer told the Daily Mirror: "It's all over for Tulisa and Fazer. Fazer has been out clubbing twice this week without Tulisa and she, too, has been spending more time with her friends away from him.

"They've still got a lot of respect for each other, but they've had a very turbulent relationship," the source added.

While they have been struggling with their relationship woes, the pair put their best foot forward over the weekend by stepping out on the town - separately.

Tulisa danced her blues away at London clubs Maddox and Movida and Fazer chose to party at Club 55.

Both have remained tight-lipped about their apparent spilt.