Defending DUI cases, of course, can often be quite difficult, but not altogether impossible. Usually, at least...
1) You shouldn't refuse the field sobriety test; and
2) And You shouldn't belt out classic rock anthems after being stopped and detained.
You do have the right to remain silent, after all.
Of course, if you decide that the officer's in-dash camera might as well be a sufficient substitute for your own American Idol audition, I can't think of a much better tune choice than Bohemian Rhapsody.
This guy seems to agree:
Check back for an update when we find out whether or not "the law won."