Of course looks are subjective, but guessing you are on about a Scottish singer there is zero chance if he worked elsewhere she'd give him a second look.
I'm sure she isn't disappointed with how much money and fame he has; but I think it's horribly prejudiced to assume/insinuate that all physically attractive people are shallow and only interested in equal physical attractiveness in a partner unless they're loaded.
Why can't somebody who happens to be very good-looking be attracted to somebody's personality, intelligence, kindness, warmth, bonhomie, humour, talent etc., just because they may not have traditionally good looks to go with it?
Of course, it does happen a lot in the perceived way, but even when it does, I'm still not convinced I see the issue, as long as the two people involved are honest with each other. Good looks are attractive, wealth is attractive; even if there are no other attractions between them, who are we to tell people what they are allowed to find attractive in a potential partner?