The 25-year-old 'Die Young' singer received the chilling package in the mail and although she tried to shrug it off she says it did frighten her, reported Showbizspy.
"What's the weirdest thing I've ever been sent? A bloody knife. One of my fans said if I wasn't his then I would be no one's and he would come and take me. I'm kind of scared he's going to make me into a lamp," she said.
Kesha also said that she once drank from a real human heart during a live performance in Australia.
"Yeah, that was real too. I did it on stage in Sydney. I think I was hanging out with Alice Cooper too much. I was really inspired. There wasn't any good reason behind it," she added.