Meet 'Insta-grandma'

Grandma Betty and her uplifting spirit all the rage on Instagram.
3:00 | 03/18/14

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Transcript for Meet 'Insta-grandma'
And finally, tonight, an 80-year-old grandmother has become a kind of American sensation. She's known as grandma Betty. And it happened after her great-grandson decided to give her a kind of gift. Here's ABC's nick watt. Reporter: She goes by the name grandma Betty. Her great-grandson, Zach, set her up on instagram in January after she was diagnosed with cancer. When you have cancer, you don't have to be down in the dumps. You can be happy with it. I don't even think about it. Reporter: A week ago, she had 5,000 followers. Today, she has -- 206,000. Ooh. That's a lot of people, isn't it? Reporter: Hip, young things from Oregon to Florida, from Finland to Australia. I love you, all. I don't know who you are. But I love you. That's a lot of good people because they're watching good, old grandma. Reporter: Betty's upbeat photos and videos are an inspiration. What's the most important lesson you learned in life? To be good to other people and love them. Reporter: Wise words from the oldest swinger online to her young followers. Among them, pharrell Williams, who wrote this song. ? And I'm happy come along if you feel ? Reporter: Nick watt, ABC news, Los Angeles. Go, grandma Betty.

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