Kelis expecting?

R&B singer Kelis is expecting her first child with her hip-hop star husband Nas, according to tabloid reports.

The 'Milkshake' hitmaker, 29, married 35-year-old Nas in January 2005, and insiders say she is already showing signs of a baby bump.

A source tells Us Weekly: "It's all they are talking about. She is carrying hip-hop royalty. They are so excited."

A spokesperson for the couple had no comment.