There are fans, and then there are extreme stalker fans who become so obsessed with an idol star or celebrity that they'll do anything to meet them, to be with them, or to talk to them. Unfortunately, these crazy heads put celebrities in danger and just like you and me, K-pop stars get scared when a stranger starts showing up in their lives. Here's part one of some of the craziest stalker fan stories yet!

MC Shin Dong Yup and singer Sung Shi Kyung were on JTBC's "Witch Hunt" when the two of them recalled their past experiences with stalkers. This got me thinking about the probably of thousands of frightening stories other Korean celebrities have also gone through in the past. Let's take a look at some of the craziest ones!

Singer Sung Shi Kyung recalled a time when a fan found out where he lived and sat on his stairs at night. His mother went outside, saw the person sitting there and fell. The singer revealed that he later when off on the fan reprimanding her for not being a fan, but a mentally unstable person

MC Shin Dong Yup revealed that he once received a package in the mail that had someone's finger and toe nails inside of it. I'm sorry? What?

SNSD's Yoona was a guest on SBS's "Strong Heart" when he opened up to the audience that she once had a stalker waiting for her in front of her dorm. When she opened the door to her place, the stalker ran in before it could close and jolted up the stairs to catch the elevator with Yoona. Feeling suspicious, Yoona decided to take the stairs and ran right into the stalker. Instead of screaming like a little girl, her B blood type kicked in and she screamed at the stalker for trespassing. What a gangster.

SNSD's Jessica also shared that on a rainy night when she was headed back to her dorm, she saw a man with an umbrella waiting in front of her place. She was waiting for the elevator but decided to take the stars when she looked back and saw the man's umbrella jammed between the automatic doors. She started running towards her dorm and she said she could hear him running too. Fortunately, she made it safely into her dorm unscathed. These girls need mace.

SECRET's Hyosung told a story on JTBC's "We Are Detectives" of a time when a fan showed up at her agency for months insisting that he had to meet her. Well girl, I'm not surprised especially when you model in things like this!