Okay so this is how the 2012 Champions seem to be packed.
Stickers - pretty easy to pick out. Just give the side of the pack a slight squeeze - if it gives there is a sticker in there.
In the packs with stickers (24 per box) you will find the showtime holochrome cards and the rookie sensation cards. This means you will get a big hit in 5/24 packs.
In the packs without the stickers (12 per box) you will find the centurion and try machine cards. This means you will get a hit on 5/12 packs.
And what i have noticed and soon the scammers on Feebay will too, is that when you put the sticker on make sure the sticker base card is the not upside down....
there will be a couple on feebay that will palm these mistakes of as error cards i do beleive and their arguement will be that it is in fact an error card but the difference being its not a manufacturing error......... i can think of 2 allready hahaha