Gritty grandma grips nation to become YouTube sensation

YONGIN, South Korea - One of the country's hottest YouTube stars is a 70-year-old grandmother whose cool, undaunted style and hilarity are a breath of fresh air in a social-media universe that exalts youth and perfect looks.

Park Mak-rye's videos are all about showing off her wrinkles and her elderly life in the raw. Young South Koreans find her so funny and adorable that big companies like Samsung Electronics are banking on her popularity.

Despite her new life as a celebrity, she still gets up before dawn to run her diner.