Kelis and Nas have officially divorced.

The couple - who wed in 2005 after a two-year relationship and announced they were calling time on their marriage in April 2009, even though Kelis was pregnant at the time - are now legally separated after a year-long battle.

According to legal documents which were filed at Los Angeles County Superior Court on Friday (21.05.10), rapper Nas has been ordered to pay over $10,000 a month for child and spousal support but is claiming he can't afford it.

'Acapella' singer Kelis - who cited irreconcilable differences as the reason for the divorce - also filed a contempt motion against Nas in February because he had not yet paid any money for the upbringing of their 10-month-old son Knight, claims which the hip-hop star denies.

Although the exact reason for their marriage breakdown is not known, the 29-year-old star previously took to her twitter blog to blast married men who are unfaithful, in what was interpreted as a veiled swipe at Nas.

She wrote: "No seriously I have no patience for any of it but the problem is women usually blame the women. I am here to say that the husband is way more at fault, now of course the woman/women who partake are stupid and pitiful. An honestly I will say its expected from younger girls 23 and under. But after that I do think we as women need to take more responsibility. Men are driven by something different then we are and that is generally stupidity, don't worry we still love you guys. We just have to be smarter."