You're being ridiculous.
I think it's ridiculous to say that the Roots invited her on the show. It seems pretty obvious that they didn't like the fact that she was being put on and this was their method of voicing that.
The thing that most upsets me is that they've done something wherein I actually have to take her side.
Well said. The extra-stupid thing is, there are plenty of songs called "Liar", and I don't (personally) think that would be out of line, but "Lyin' Ass Bitch" is too much.
Of course, this also probably means he's more afraid of offending Scientology than he is uber-conservatives.
Just based on what Nate is passing along, I don't think Fallon would've gone along with it had he known, so I assume they didn't say what they were playing and he didn't recognize it. But, actually, come to think of it, I would think a talk show like his would have more to fear from offending scientologists than uber-conservatives; I mean, there's a pretty brief window where politicians are looking to get TV time and will show up on a show like his (that window is presumably now closed, for his show).