The "boobies" bit was funny for about 10-15 seconds, but then that should have been it. Instead, we get the whole teeth grinding number.
I think that long bit would have worked better if we had live "real" reactions from each of the most/all of the actresses mentioned, although I know that would have been challenging to pull off live given the pace of the song. They did show a couple of actresses pretending to be shocked or appalled by the song (presumably pre-taped or rehearsed), but that wasn't funny. Seeing their REAL reaction -- and of more of the actresses -- would have been interesting if not funny.
On a side note...I can't believe I'm analyzing a skit about "boobies."