After listening to the same iDOLM@STER tracks for years, I began to parse some of the text; usually it comes as a sudden understanding while driving along. The full message often remains mysterious. For example, it appears that Agent deals with prostitution (canonically performed by Makoto, Ami and Mami to boot [the song is performed, not prostitution — Ed]).

There's also a number of amusing dialog inserts. Some are whimsical:

Ritsuko:	kokuhaku-tte dou saretai? meeru? denwa? yappari atte? 告白ってどうされたい? メール? 電話? やっぱり会って? How would you want to get a confession? Text? Phone? Or in person?
Azusa:	sukina hito nara, nandemo ii kamo 好きな人なら何でもいいかも… If it's my beloved, anything works
Chorus:	Meeto! (?!)
Azusa:	tsukiaetara, dou suru no? Asobu? Hanasu? Soretomo..? つきあえたらどうするの? 遊ぶ? 話す? それとも~? When dating, what to do? Play? Talk? Or...?
Ritsuko:	Tada, isshyoni iru dake de ii kamo! ただ一緒にいるだけでもいいかも… Simply being together is good
Chorus:	Internet! (?!)

(from "Sha-la-la")

Other times, it's like this:

Makoto:	ne, ne... kami-sama-tte hontou ni iru no kana? ね、ねぇ、神様って本当にいるのかなぁ？ Listen, do you think God really exists?
Haruka:	un, atashi wa iru to omou yo うん、わたしは居ると思うよ！ Sure, I think he does!
Makoto:	e? nande? えっ？なんで？？ You do? Why?
Haruka:	uum, nani ka wo omotte, dare ka wo shinjirareru nara, atashi wa sou shitai nah うーん・・・何かを思って、誰かを信じられるなら、わたしはそうしたいなっ！ Oh.. I thought about it and if I can believe in someone, I want to believe that!
Makoto:	~ sou da ne. jaa, yukou ka? ・・・そうだね、じゃあ行こうか！ Right on. Well, let's go!

(from "YES")

I think an American would probably say "if I were granted a capacity to believe, then..." there, and perhaps she meant just that, but it's hard to be sure.