Dancemania 11 is an Album by I-Dance. On Dance Dance Revolution 1st mix for the arcade, there is a commercial of Dancemania which shows the albums from 1-10. On the song select if you highlight Kung Fu Fighting, You can see a logo of Dancemania 11 on the bottom right of the screen. This was planned to be an album and it would have featured the song Kung Fu Fighting on there. But the song would end up getting on Dancemania Extra, and Dancemania 11 would later become Dancemania X1.