He doesn't messed up, it's their choice to dance while singing high note or not to dance to express and sing high notes, it's hard to do that if you're not trained.
Wtf why is this so underrated. This is by far the best cover to the Taki Taki cover. It’s quiet difficult to move your hips the way they did. Keep up the Good Work guys! You’ll get your recognition one day
Honestly these peoples make ur chanel look bad lol hope you better never invite them again to do a kpop reaction they dont knw what they talkin abt, they just think all the scene is a comedy to laugh lol