I'm partial to the Right Now cover by AA and I dont remember who did the Bad Romance cover but the most redeeming part of it was the bridge/breakdown. Best one on the CD
Ya gotta remember though, most of these bands implement synth now so why not use it in the cover?
And yeah I remember the real punk goes pop comps. Not that old but I always dug Rufio's cover of Like A Prayer...now that i think of it, that was on the original pop goes punk 3