If a singer's song transend musical genres, can you classify them as either rap or rock? Why?

it can be classify as all around singer

same thing for dancers

The correct answer to this open question is the following.

If a singer's song transcends musical genres, you don't classify them as either rap or rock. This statement includes a part of the answer when it says "transcends musical genres." If that is the case it means that the song is a now a "classic" beyond a broader term call rock, that originally was written under the influence of a musical genre or the fusion of different rhythms. But with the pass of time or popularity, the song is part of the culture of a generation that is considered that trascended musical genres and simply is popular.