Hmmm. Good question. Depends on who you ask.
For example:
It's a comb, right Franck
I'm not so sure that it's necessarily the right advice though. Since the judges are likely to be watching you for about 20 seconds, chances are, you're not going to do your 'big move' when anyone is watching anyhow.
You did pretty well last year as I recall without them....??
Steve