The Milkshake singer confirmed she was pregnant with her second child in September (15) and sources tell the 36 year old gave birth in November.

"Kelis has a healthy baby," a source tells the publication. "(She is) thrilled."

No other details about the baby have been released.

The newborn joins big brother Knight, Kelis' son with ex-husband Nas.

The singer has yet to reveal the identity of her new baby's father, but she recently confessed her six-year-old boy was looking forward to becoming a brother.

"He's over the moon," she said. "He feels like... the baby is more related to him than any of us. He just feels like it's his baby... he's all about it. I'm like, 'Great, I'm so glad you're into this'."