I love REO Speedwagon.... and they sing very much in the standard pronunciation in most of their songs.It's interesting to think about how the pronunciation affects the style of the performance as well.
If someone sang most of the songs in this thread with the standard pronunciation it would sound nerdy as hell. Brenton Wood especially just has that style and swagger in his delivery that makes his odd pronunciation sound right.
Just a thought I had. I can picture people singing some of these songs in a karaoke bar and sounding like complete dweebs with their proper pronunciation.