Do you know of the Korean women singing group "Spica"? It's from two of their videos based on the same song.
In the videos, there are recurring costumes that give the women large backsides randomly In the videos.
Starts at 38 seconds:
https://www.youtube.com/watch?v=Y6dVIbmLZ-4
Recurring moments start at 1:12 In this one:
https://www.youtube.com/watch?v=hc1RwpRfbT0