[Shaun]

Scott, so he can soak up all of the STIs like a sponge and save the other 5 of us - also to harrass the DJs to play tracks from Matangi.
Ammi, because she would probably stay at the hotel and cook for us and then tell us we're all silly for getting in such a state, but never judge us, and then on the last night she really lets her hair down and breaks her leg jumping from a balcony screaming "I'M A ****IN SEAGULL HAHAHA".
Karl, for the swag, the banter, the drugs and the moves. Ultimate wingman.
Ninastar, because she'd spend the first half of the trip moaning about how disgusting teenagers are and then we'll find her on her knees in the back of a limo, chewing carpet.
& Harry! for the music and the love.

I'd have taken Zee but he'd be in the hospital on the first night and end up having to fly home early with something like TB.