For the past six weeks, pop star Britney Spears has been receiving threatening packages containing explicit materials -- including sex toys and disturbing letters -- as reported by OK! Magazine.

The creepy cartons have been sent several times a week to an L.A. address for Spears, but not to one of her two homes, a source told OK! – and contents have reportedly included a battery-operated sex toy, along with two letters; one handwritten and one typed -- both containing pornographic writing.

The parcels will be turned over to the FBI after being reviewed by Brit’s security team. Despite the disturbing stalker revelations, Spears seemed to be in good spirits again this weekend when X17online.com spotted the shop-happy mother of two (with bodyguards) getting some parcels of her own -- at Off Broadway Shoe Warehouse in L.A.