The Roots now must check with NBC executives before playing any song on the network's "Late Night with Jimmy Fallon" after the band played Fishdance's "Lyin A** B**ch" to introduce Presidential candidate Michelle Bachmann last month.  Roots drummer / bandleader Questlove talked about the newly implemented policy in an interview on Thursday.  "It's still a comedy show, so they promise not to step on my toes or that type of thing, but they definitely want to know the title of the song, the subject matter of the song, can it be seen as an insult?"