U.S. pop star Britney Spears is pregnant with her second child, according to U.S. media reports.

The 24-year-old singer had been the subject of much speculation after she was photographed on a Hawaiian holiday earlier this year revealing a tummy bulge. According to American publication Us Weekly, sources close to the singer have confirmed that she is expecting a second child with husband Kevin Federline.

The magazine reports that the second Spederline spawn is due in late September or early October -- almost exactly one year after the birth of the couple's son, Sean Preston, who is currently seven months old. The singer was spotted at Caesar's Palace in Las Vegas, Nevada, over the weekend sporting a red bikini and her baby bump.

Editor: Donald