A male fan once sent Ke$Ha a bloody knife and threatened to kill her if she didn't date him.

The Die Young hitmaker received the horrific surprise in the mail and now the 25 year old admits she is always looking over her shoulder out of concern for her safety.

Answering questions about some of her wildest life experiences, she tells NME.com, "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.'"

The singer additionally opened up about one of the most unusual things she has done onstage - drink from a real human heart during a gig in Australia.

She jokes, "I think I was hanging out with (shock rocker) Alice Cooper too much. I was really inspired. There wasn't any good reason behind it."

Ke$ha also explained her craziest Twitter.com post, which featured an image of the star urinating in the street.

She adds, "I got into a lot of trouble with my management for tweeting a picture of me peeing, because I pee on everything. It's not a big deal, it's not like I was pooping."