I think this guy, McRorie, is so much my definition of a "Power Single", simply because he is playing all the parts himself, "live"...bass Left Hand, Rhythm chords Right Hand, Lead vocals and Lead Guitar via voice and mic, and drums by footwork and hands. There is not one part pre-recorded.

If the primary function of the performer is simply singing over a prerecorded background, such as an MP3 or any kind of an SMF, they are hardly a "Power Single" in my opinion, no matter how much the audience is captivated and/or enthralled.

They are, what I would call, a great "entertainer", or "solo entertainer"....some people would even go so far as to call them professional Karaoke performers, depending on how much actual keyboard playing was being done, but, "entertainer" works just fine for me.

Ian

PS...just for the record, I don't consider myself a "Power Single".
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