If you want a laugh, try both Momo's Maji Natsu and Kumarisha's Waracchaou. They're awesomely bad.

Makes me wonder if all of them were lipsynching at Yoyogi. Coz Momo did try to sound good at her solo lines but Kumarisha sounded equally bad at all lines. :p
Oh! Miya's Chu Natsu Party is pretty good.
And thanks, Ayabie. It's also from the Tsugunaga Seijin series.
