"Ready Steady Go" was a 1960s era British TV show about the latest popular music. Its presenter (host) was Cathy McGowan.
The narrator gets all of his musical opinions solely from that TV show, and he only watches that TV show because he thinks Cathy McGowan is attractive.
This is pretty straightforward: Idol is playfully mocking the previous generation for how they "learned what's cool" i.e. because it's not in fact cool to base your entire musical knowledge off a TV show that you watch because you think the host lady is hot. But, that's what the vast majority of young Brits in the 60s did.
"Ready Steady Go" was a 1960s era British TV show about the latest popular music. Its presenter (host) was Cathy McGowan.
The narrator gets all of his musical opinions solely from that TV show, and he only watches that TV show because he thinks Cathy McGowan is attractive.
This is pretty straightforward: Idol is playfully mocking the previous generation for how they "learned what's cool" i.e. because it's not in fact cool to base your entire musical knowledge off a TV show that you watch because you think the host lady is hot. But, that's what the vast majority of young Brits in the 60s did.