Believe it or not. There was an actual time when i used to have THE biggest crush on chris brown...then he started dating rihanna so my love for him quickly faded.(I will not fight over men with the Rihanna. lol ) After that Feb 09 was THAT day i started to strongly hate him but now i'm just STRONGLY dislike him.
So to answer your question. Yes & no. Like Katy Perry thing. That did have an influence on me liking her but she's still not my cup of tea.