Exponential girls bands

In the idle hours of morning, have been browsing the web. This is what I have discovered about Japanese music...

Morning Musume's recipe for (musical/other...) success:
1. Get loads of young girls to form a band.
2. Keep adding girls.
3. PROFIT!!!

Seriously, as the video (in the full post) below demonstrates, you're definitely taking it too far if you can make a song that lasts over six minutes just by introducing each band member...