I'm a sucker for a great cover tune, and if you aren't then you're just too cool for school!
Quiet Riot's cover of Slade's "Cum On Feel the Noize" is better known than the original. This version by Oasis, apparently well known among more dedicated Oasis fans than this one, is absolutely addictive and has immediately shot deep into my top covers list, along with Jimi's "Like a Rolling Stone" and Jawbox's "Cornflake Girl".
What's on your list?