I would like to wake up to a something absolutely epic like Bohemian Rhapsody. xD Though, that's a pretty unusual question and slightly confusing. I don't recall waking up listening to music in my head. I wouldn't be surprised if I ever did. Though, I always hear music in my dreams. ^^;

It'll be nice to wake up to "Here Comes the Sun" by the Beatles or '70s Soul Remix' of Epik High's "I Remember". xD That would start off my day nicely and mornings wouldn't be so painful anymore. If it was Hikki, I would say something laid-back like "Nichiyou no Asa". It won't matter if it's a Sunday or not.