What is “Team Anne” and “Team Katherine” all about?

I don't know whether you were aware that when Jennifer Aniston and Brad Pitt broke up and he started seeing Angelina Jolie people started wearing Team Jennifer or Team Angelina t-shirts and taking sides. Well, it's just like that. People taking sides and thinking that because they admire Catherine of Aragon that they have to say bad things about Anne and vice versa.