Wild party girl Britney Spears is sparking rumors that she is pregnant with her third child, after the toxic star was spotted shopping for home pregnancy tests in Los Angeles recently.The pop star had visitation rights for her sons suspended after her bizarre stand-off with emergency services at her Los Angeles home earlier this month, which occurred when she failed to hand over 1-year-old Jayden James to ex-husband Kevin Federline's bodyguard following a scheduled visit. But Spears appears to be getting serious with her paparazzo boyfriend Adnan Ghalib, after she was snapped browsing pregnancy tests at pharmacy store Rite Aid earlier this week.