Britney Spears News

The onetime chart-topper gave birth to her second child, a boy, about 2 a.m. Tuesday at a Los Angeles hospital, a source confirmed to E! News.

The newborn--name not yet known--weighed in at 6 pounds and 11 ounces, per the National Enquirer, which was first out with the nursery news.

Spears endured her labor day at Cedars-Sinai Medical Center, Us Weekly said.

Up until Tuesday, the singer's baby boy was a baby girl, at least according to stork watchers, who confidently predicted an XX-chromosomal bundle of joy named Jailynn for the performer.

The XY-equipped offspring is the second for Spears and husband Kevin Federline in the past 12 months. Their firstborn, Sean Preston, arrived last Sept. 14.

Reports of the latest Spears-Federline production were rampant Tuesday, fueled by Enquirer and Us Weekly website postings. As of late Tuesday afternoon, the couple's camp still had not formally confirmed or denied the stories, although Spears' father, Jamie, was indirectly quoted as telling Access Hollywood that he'd seen the new baby.

An even more prolific procreator than Spears, Federline is now officially the father of four, including two from a previous relationship with former Moesha actress Shar Jackson.

On average, the 28-year-old Federline has fathered a baby every seven years. If one throws out his presumed prepuberty years, the aspiring rapper and penny proponent has averaged, from age 13 on, one child tax credit every 3.75 years.

Spears, 24, announced her latest pregnancy in May on the Late Show with David Letterman. In June, she showed off her pregnancy, bare stomach and all, on the cover of Harper's Bazaar.

Spears' first year as a mother was marked by paparazzi-driven controversy--and more than one visit from social workers.

In February, the "Oops" singer was scrutinized for driving an SUV with son Sean Preston on her lap. In April, she and Federline were quizzed about a reputed head injury to the baby. No formal investigation was opened, and Spears and Federline were not deemed responsible for the injury--said to have occurred in an accidental fall from a high chair.

"I can't go anywhere without someone judging me," Spears told NBC's Matt Lauer in June.

The baby-in-the-lap-while-driving thing, the Louisiana-born singer explained, was an old Spears family tradition: "We're country."

Spears, once a teen pop queen thanks to "...Baby One More Time," "Sometimes," and more hits, hasn't released an album of new material in nearly three years. She won her lone Grammy in 2004 for Best Dance Recording for "Toxic."