What's a good celeb/color/song to base my clothes on?

Well, you said you know you shouldn't! =)

I would not choose a celeb or song for your entire home decor or wardrobe.

Out of the options you've suggested, color scheme.

So, decide what color(s) flatter you...and ask others that you know. Your clothes can't just be a bunch of unflattering colors because you like them in your decor.

Go with that first --- then coordinate your decor.