How many hairdressers does it take to change a lightbulb?

Yesterday I walked past a Tony & Guy salon. Inside, the hairdressers were having a meeting - seated together and taking notes.

This got me thinking…

Q: How many hairdressers does it take to change a lightbulb?

A: One (if the bulb just wants a Wayne Rooney shaved head style).
Or two or more - if it wants a more elaborate style, like what Tina Turner has.  

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For all you hairdresser joke fans out there, I’ve just done a quick google search and it seems that my joke is less hairdresser labour intensive than other hairdresser jokes. The usual response is:

A: Five. One to change the bulb and four to say “Marvellous Gary.”