Are you seriously calling Mr I.Am's electronically retuned waveform "Art"?
Why did they have to use a new track (apart from the publicity Mr Am gets)? There are plenty of far more musical pieces which could have been played.
Personally I rather like the idea of the rover trundling over the Martian surface with "Ride of the Valkyries" blasting out.
Or maybe Monty Python's universe song with a few re-edits to allow for the different orbital and rotational speed of Mars.