He's very young. It's hard to tell what footballers will turn out like at his age. He's young, free, influenced by others perhaps and rich as all get out! Whether he'll continue, get worse or get bored of this stuff will show in the next few years I suppose.

He probably claims not to drink/smoke because he's Muslim. It's not approved of, I believe, although not unheard of especially in more leniant muslim countries. He probably wants to be a good boy or at least portray a good image.