The slightly annoying, slightly genius guys who brought us 'Auto-Tune the News' are now dabbling in auto-tuning some great historical speeches with a feature called 'Time Travel in Song'. I like their version of Winston Churchill's 'Great Declaration' of December 1941 (I'd skip the other ones, they don't improve on the originals).
There's a certain trancy element that makes Churchills combativeness and stoicism into something almost pastoral. It's not a rocker, but it's kinda nice.
For those of you unfamiliar with auto-tune, it's a software program that can turn pretty much any speech into singing. A lot of singers with bad voices use it to get on key, but it's also open to other (ab)uses.