The song Welcome to the Show was an old Gacha trend that was commonly used with Gacha Club. They were used with different characters from different franchises, but mainly My Little Pony. They didn't have any tambourines in the Props section or the Instrument pose section, so they used ninja stars. I think they could use the records instead of ninja stars. Here are some videos of the old trend, but watch the FNAF one if you dare. (The FNAF one is so cringey and off sync)