Critic Philip Auslander argues that the distinction between pop and rock is more pronounced in the US than in the UK. He claims in the US, pop has roots in white crooners such as Perry Como, whereas rock is rooted in African-American music influenced by forms such as rock and roll. Auslander points out that the concept of pop rock, which blends pop and rock is at odds with the typical conception of pop and rock as opposites. Auslander and several other scholars such as Simon Frith and Grossberg argue that pop music is often depicted as an inauthentic, cynical, "slickly commercial" and formulaic form of entertainment. In contrast, rock music is often heralded as an authentic, sincere, and anti-commercial form of music, which emphasizes song writing by the singers and bands, instrumental virtuosity, and a "real connection with the audience".