Lee Hyori responded to a fan's advice to be careful on Friday the 13th with humor. 

A fan posted on Lee Hyori's Twitter "Since today is Friday the 13th, I read that women with big breast should not shower today. Please be careful."

Lee Hyori responded to this tweet "I better be careful then." Her response made fans laugh as she flaunted her nice body. 

Netizens who saw this commented "only Lee Hyori has that kind of wit," "I laughed my ass off" and "you really should be careful."

It seems that the fan had made a reference to the movie 'Friday the Thirteenth' where actresses were skilled while showering by Jason.