Unfortunately, they've taken down the thrilling Karaoke Queen "battle" between Risa and Kaori Mizumori.
Risa ft. in this song (around the 3 minute mark)
and a simple interview
Risa and members of AKB48 show how to be adorably mad to prompts from the panel on Shibuya Deep A.
If someone finds that Karaoke Queen battle again, please post it.