There's been quite a negative reaction from both japanese and western fans for the choice of akb48. With the japanese describing them as 'a group for disgusting idol fans' and the western fans saying that they don't think they're suitable for the series.
Obviously they're not aware that aki-p is a bit of a pop music genius. =P
If the song is successful it could really increase their fanbase. Also I'm glad Takamina is in this, she's a big fan of it. Maybe they're chose girls that are fans of the show, remember shiichan's saiyan outfit? hehe