There's not really a rhyme or reason.
She basically sits on her laptop all day like a 16yr old, she runs thru all the gossip sites, tumblr, twitter, etc. She gathers imagery and ideas in her head and then she finds a way to make it ridiculous.
She never wanted to wear something that wasn't going to piss someone off. Especially during Born This Way,
she wanted everyone to think she was a mess. I have no idea how her mind works with her costumes now.
