I picked up the FTL soundtrack in the latest Game Music Bundle, and I was listening to it on my way home yesterday. As I was listening to the track "Milky Way," I started to sing "Get Lucky" along to it and it was kind of loosely working. I've never done a mashup before, so it took me a long time to get the parts together sort of the way I wanted. Unfortunately the vocals-only track I found was really poor quality - overall though, I'm generally happy with how this turned out:
http://youtu.be/qlFm3WpwhhY
Maybe if the muse strikes me I'll do it again sometime.