It seems to be an almost unanimously held view that whether a particular song/artist is better than another is just a matter of opinion. I'm not at all sure that this is correct though. For example, The Beatle's "Day in the Life" is clearly better than Joe Dolce's "Shadupa ya face'; and Joy Division's 'Heart and Soul' is objectively better than "The Chicken Song".
What do the rest of you think? Is it all just opinion, or are some tunes/artists just better than others?