Party girl Paris Hilton is facing more drug allegations from former boyfriend Nick Carter, with the Backstreet Boy accusing the socialite of smuggling cannabis abroad in teddy bears.

Carter says that the 25-year-old is addicted to the drug and would go to great lengths to ensure she had a supply readily available.

"She had to have her own private stash with her at all times regardless of the consequences," he says in an interview to promote his new reality TV show, House of Carters.

"If she was going overseas she'd cut a hole in her teddy and stuff it with cannabis," the singer goes on to claim.

Earlier this month Paris was pictured with what appeared to be marijuana in her handbag, but she has since vehemently denied the claims, insisting it was merely tobacco.

But regardless of drug allegations, Carter says that the heiress' wild ways are what ultimately led to their relationship's downfall.

"Night after night we'd just get utterly wasted and Paris can't take her drink.

"I'd be pulling her off nightclub floors, with her wearing next to nothing, and putting her to bed totally off her head," he said.