It's the Japanese We Cheer! WITH Love Machine! And the dance steps are near identical to the ones from UNiSON (and the video but still)!
...yet...We Cheer is better. No. Seriously. Notice how there's only one Wiimote? Notice how the moves come at you much slower? Notice how there's no good way to gague how fast a move is supposed to be until it's already in motion? Also no 4Player...and honestly I think the controls are worse. Also only 25 songs as opposed to 30 and only 5 stages as opposed to 11.
Even stranger? We Cheer came FIRST! It was made in Japan FOR America. It was announced, made, and released first. Happy Dance Collection was only afew weeks behind but still...
Happy Dance Collection isn't bad and I do like it. It's generally a more polished experience. But I DEFINITELY prefer We Cheer.
Oh, and yes, you can customize the girl. I personally really like this setup I have here ^_^