I couldn't pick a specific decade as there have been so many good artists/bands that cross decades, some by a few, look at elvis or abba for eg to name just 2.
Another that has been around a few decades is the king of parody "weird al" here is a couple of his newer parodie's.
http://www.youtube.com/watch?v=GsfVw9xxoNY
http://www.youtube.com/watch?v=b08ygyDgD6Q&feature=related
http://www.youtube.com/watch?v=Lp6eswhgOKk
Very funny
