Pop star Jesse Mccartney has resparked rumours Jennifer Lopez is pregnant by blurting out the happy news during a radio interview in Los Angeles. The teen idol was making an appearance on Georgia's Star 94 when he left presenters speechless with his insider knowledge about the real reason Lopez quit the Dallas movie last month (JUL06). After revealing he's dating David Cassidy's daughter KATIE, who has been cast as LUCY EWING in Dallas, MCCartney spilled secrets from the set of the film. When he was tested with the question, "I bet your girlfriend can give us the scoop on why Jennifer Lopez was fired from the movie?" MCCartney blurted out, "She didn't get fired. She's pregnant." After an awkward silence host VIKKI LOCKE was urged to change to subject by MCCartney's handlers. Lopez's apparent pregnancy has been making headlines for months. Neither she nor husband Marc Anthony have confirmed the reports.