Man, everybody in the celebrity party circle does coke. Seriously. Coke is more acceptable than weed, and lasts a hell of a lot less longer high wise and doesnt leave you dopey. That whole scene does coke.
And a LOT of performers do coke before going on stage, it gives them more energy and more hype in their performance. What are you going to do? Drink 20 cans of Red Bull or snort a line of coke? On tours like that man, the schedule is fucked, and energy is hard to keep, sometimes you just need a boost.
And LOL at my dude in the Bum Squad t-shirt, shout outs to the Squad!