Kelis Welcomes a Baby Boy!

Kelis has welcomed a baby boy. Knight Jones -- who weighed 7.8 lbs. -- was born Wednesday around 9 p.m. in New York City, a rep for the 29-year-old singer tells

Adds the rep, "The beautiful baby boy and his mother are doing wonderful."

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Kelis had been in labor since 2 a.m. Monday and had a natural birth, with her mother and sister by her side in the room.

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It is the first child for the "Milkshake" singer. The baby's father is rapper Nas, with whom she split while seven months pregnant.

The two are currently embroiled in a bitter divorce, as Nas has asked a court to deny Kelis any spousal support that she has requested.

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Both sides are also seeking joint custody of the child.