LATEST: Britney Spears has blasted reports she is pregnant with her third child - insisting she was shopping for a pregnancy test on behalf of a friend. The troubled star was spotted browsing for home pregnancy testing kits in a Los Angeles pharmacy earlier this week (begs14Jan08), accompanied by her paparazzo boyfriend Adnan Ghalib. But the Toxic hitmaker dispelled the rumours herself, telling, "I never had a pregnancy test. It was for my friend." The singer, who already has two sons with ex-husband Kevin Federline, was previously forced to deny reports she was expecting producer Jonathan 'J.R.' Rotem's baby in November (07), after an apparent confession appeared on a private MySpace page, allegedly belonging to the star.