From MTV:

Singer had first child Friday at Los Angeles hospital. The No Doubt singer delivered her baby at Cedars-Sinai Medical Center in Los Angeles on Friday afternoon (May 26), according to her label representative. Stefani's rep issued a brief statement that read, "Both mother and child are doing well."

Stefani and her husband, rocker Gavin Rossdale, named the child Kingston James McGregor Rossdale; he weighed in at 7.5 pounds.

A rumor circulated earlier this week that Stefani had given birth in London, despite paparazzi shots released Wednesday that captured a still-pregnant Stefani in Los Angeles.