Vendetta raises a valid point - what's the line between what's considered a gimmick and what isn't?
I would have thought that you could class the ballet heels as a gimmick. Fan-dancing and balloon pops were once a gimmick but now they are a standard.
I think anything that makes you memorable or stand-out could be a form of a gimmick; but as the song suggests "you'll never have to sweat to get paid, when you got a gimmick, gypsy-girl you got it made!" - the gimmick is the essence of the act.
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Lucille B xxx