Help finding a good song for my music theory cl ysis?

I'm down to the wire for my end-of-semester grind, and I need to pick a good clical or jazz piece that features at least one modulation. I don't listen to either really, so I don't know of any good pieces to start with. It should be challenging, but not...too challenging? A link to the sheet music would be a huge help. Don't worry, I'm not asking for the roman numeral ysis, as that work I'll do on my own, as well as the paper I have to write about my ysis, so this isn't a "do my homework" kind of thing.