A source close to Britney Spears tells TMZ that the popwreck's comment to our cameras last night denying sister Jamie Lynn's pregnancy was a joke. She was "being sarcastic," we're told. "She knows." Hope so!
Brit had been out on a late-night shopping excursion when photogs asked how she felt about being an auntie. She replied, "My sister's not pregnant!" much to the surprise of the throng around her.