"To crow over seeing an actress with her top off in a rape scene seems horrible."
Which was one of the points of the song, although no-one seems to have actually watched it in context.
Captain Kirk has arrived from the future to tell Seth Macfarlane not to continue, because he has seen the outcome and tells Seth that "The show's a disaster. Your jokes are tasteless and inappropriate and everyone ends up hating you". Seth asks what he does wrong, and Kirk/Shatner plays Seth a clip from 'the future' where he sings this tasteless, inappropriate song about boobs that makes everyone hate him.
The actresses are obviously in on the bit. The writers and performers know how tasteless it is, that's why it's funny. It's contrasting the glitz and glamour of the Academy Awards with a childish song about boobs, plus acknowledging that doing something so ridiculously inappropriate makes everyone hate the host. Obviously they were dead on the money.