Nicely done with the instrumental and acappella(?).
At some places it sounds a bit strange because of the timing in Get Down Make Love(I think), but overall I think it sounds good. ;-)
Daniel has a point, it is better in the first minutes, but then I guess most mashups are like this. It got me dreaming of Queen disco. This would be a great hit on the dance floor on a Queen convention. Even my 2 year-old boy came running to the computer and started dancing (no kidding)!