(Agencies)
Updated: 2007-11-29 09:03

Britney Spears has denied breaking news reports she's pregnant with her third child.

Publications have reported the pop star is four weeks pregnant with music producer J.R. Rotem's baby--and the young mogul has reportedly confirmed the news overnight.

But now Britney is speaking out about the story, insisting she is not with child.

After spending the night shooting a video for her new song "Piece of Me" in Hollywood, Spears sent a cell-phone text to Los Angeles radio host Ryan Seacrest to rubbish reports early on Wednesday.

Heading home "to sleep" after the all-night shoot, Spears wrote that J.R. doesn't even know what's up. It's fake, completely fake."

Spears then apologized for not calling into the show, explaining, "(The) paparazzi are trying to kill us; otherwise I'd talk."