>> reporter: listen to this mom and her oven. ♪ that's her daughter halley, mortified. her mother amy has a knack for this. this time to usher's "yeah." but there was something about this video that so many could relate to, seen by millions. mothers and their children, who know what it's like when mom or dad embarrasses them. amy stevens and her daughter's video seen by millions. it turns out her daughter was on that app posting videos. in the end it was her mother's 10-second video that went viral. even though she looks embarrassed, her daughter halley is proud of the joy her mother has brought others. >> my favorite part is all the positive. like, this has made our day. we want moms as cool as you. >> reporter: turns out amy was their stepmom. after years, she adopted them as her own. and part of her love for them has been shown through her dance moves. ♪ >> i don't think you ever need a reason to dance. i dance on the treadmill, at the gym, i dance at walmart, i dance at publix, i...