I am happy in your head But I know you don't care It's never made a difference It's okay, I don't care But happy birthday Happy birthday I know that everything has changed But I want you to be there I hate that everything has changed I thought that you'd be there But happy birthday Happy birthday Kiss your forehead, I'm in love Crying "It's different now it's done" I am your twenty years bad luck Miss your boyfriend, you're in love I'll die for the putrid things I've done I am your twenty years bad luck I am your twenty years bad luck I am happy in your head But I know you don't care I am happy in your head But I know you don't care I am happy in your head But I know you don't care I am happy in your head But I know you don't care You don't care You couldn't care less Happy Birthday Kiss your forehead, I'm in love Crying "It's different now it's done" I am your twenty years bad luck Miss your boyfriend, you're in love I'll die for the putrid things I've done I am your twenty years bad luck I am your twenty years bad luck