Chillout Song

Hello folks,
I am looking for a song which I would classify as some kind of pop/rock.

Both a man and a woman are sing it, the man mainly sings the chorus, which sounds similar (not exactly!) like:
"...in my ways,
...in(side?) my head,
...in my ways,
(I don't mind?), I don't care."

I hope someone knows it, it's killing me! :<