0 it started out as a weekly routine forrester and her her 24-year-old granddaughter chelsea playing oldies. that s how it happens. i pick her up, make her breakfast and blast the music an she dances her way to the car. the next thing you know, run around sue is running around the internet titled dancing nana. you can tell she is really going to get down when she puts down her purse. when she sets that thing down, she means business. no run around. people are loving the purse drop. reporter: nana wears her life alert like geriatric bling on dancing nana part two, she s dancing in the streets. it doesn t matter what you wear reporter: and on dancing nana part three, she belts out a tune popular in her day. you re gonna miss your big fat momma . but run away sue is her big viral hit. and she brings down the house with her last line. oh, i could dance all. [ beep ] day. i remember filming and when she said that, i was just like oh, my god! reporter: these day