Even although it's happening in December

I'm excited for it. I refer to a Friday 13th midnight screening of the Rocky Horror Picture Show at my favourite art deco cinema.
Before the show a few friends and I are nipping into a local vegan cafe; I'm not vegan but it's more for my friend. It's sometimes hard to locate vegan friendly foodstuffs.
I'm an omnivore, btw.
Who's your favourite Rocky Horror actor? And song?