a couple i'd have to go for (off the top of my head)...
everyone's a winner (baby!) by alan vega
d'ya think i'm sexy - the revolting cocks
both sure to bring a smile to my face!!
best cover of a bolan song is a difficult one (I've got more than my fair share of dodgy ones), though i suppose i'd have to nominate bauhaus version of telegram sam as one of the more ridiculous...