Would you like extra stink with that?
Watch what happens when a ringer (e.g. Sly And The Family Stone) enters a talent contest (e.g. the 1968 Ohio State Fair.) Basically, they win. I've worked production at things like this dozens of times, but I've never seen a Sly-quality band win. Usually, it's a 12-year-old that has memorized "Moonlight Sonata."