Nas and Kellis to split

The milkshake seems to have gone sour between Kelis and hip-hop star Nas. Court records show Kelis Rogers filed for divorce Thursday in Los Angeles citing "irreconcilable differences" as the reason for the split. She's expecting the couple's first child in July.

Documents show the couple was married in July 2003 and separated in April. Rogers is seeking to have her hip-hop husband pay her attorney's fees and spousal support.

Nas' (real name Nasir Jones) is considered one of rap's best artists and received a Grammy nomination for his latest Untitled album. R&B Singer Kelis is best known for her hit singles "Caught Out There" and "Milkshake".