I Don't Care/I Should Have Known It
 

I've been listening to a lot of Heartbreakers stuff recently and I was listening to their song "I Should Have Known It" from their 2010 album "Mojo" and I noticed how much it sounds like "I Don't Care". Michael Campbell wrote the music for both of those songs and I wanted to know if anybody thought the same thing.

I hear the similarities. But it's not that surprising. I don't think it was intentional. It's just that musicians have particular patterns they might intuitively repeat in different contexts.