I broke out in a fit of giggles listening to this. XDDD
But actually, he doesn't sound bad, it's just...well...it's him.

Go Tsunku!
It's actually kind of cool. Lol. But I've gotten so used to the Morning Musume version that this creeps me out. Haha.
The 'uhn' part gave me the chills. Lol. Disturbing~ So did all the 'hai~' parts. Cannot. Do. Cute. XDDD
And LOL at the 'HELP ME!'. Agreed with everyone else, only Sayu does it properly. Haha. Actually this version's not bad, but still....XDDDD
Anyone wanna see Tsunku sing this with the girls? Oh wait, don't answer that! XDDDD