“I’m Princess Diana,” Britney Spears has been gushing to anyone who’ll listen. Hot Showbiz Report insiders are wringing their hands over Brit’s drugged-up obsession with the world’s most beloved royal.

Britney wants to purchase the wedding dress Diana donned in her 1981 nuptials to Prince Charles, she’s even talked about contacting the designer dressmaker ELIZABETH EMANUEL directly.

“People close to Britney think it’s weird but no one dares tell her as she is so vulnerable right now. Anything could tip her over the edge.

“We’re all very worried as her behavior is getting weirder by the day.”

“She’s utterly obsessed with Princess Diana. We’re worried about it,” says an unidentified source.

“She’s turned one of the rooms in her house into a shrine to Di — there’s photos, books and cheap souvenirs everywhere.”

“Britney has told people she truly believes she and Diana share the same path, the same destiny! She’s taken to surrounding herself with anything connected with the princess.”