

Practically every single major pop music writer has faced a legal challenge. The more successful a song, the more people come out of the woodwork to cash in.
There are no new notes, no new chord progressions, no new rhythms, at least not in the mainstream. People love songs that sound vaguely like something else they already know, because those melodies and rhythms are associated with emotions already. So popular artists are constantly trying to make new songs that sound like songs people already like.
This is not a new phenomenon, and it’s why music trends all seem to congeal around a singularity until people get sick of it. It happens in all genres, even experimental music like jazz, dubstep, and screamo, where people try to push the limits of taste and art. Eventually patterns emerge and find the repeating cycle of success, saturation, and surfeit.
And sometimes that works out for lawyers who want to get paid.
Go to the landlord and provide your account of what is happening. Document as much as you can, and stop trying to figure out why they are so upset. You’re not going to discover some hidden rational explanation, nor is that your responsibility. Protect yourself.