Rob Shuter / ROB SHUTER'S Naughty But Nice: EXCLUSIVE: BRITNEY SPEARS BANNED FROM KRIS JENNER'S 70TH BIRTHDAY BASH - "TOO MESSY," INSIDERS SAY - PLUS: FERGIE PLOTTING A U.S. COMEBACK, AND JUSTIN BIEBER ACCUSED OF SMOKING BEFORE HIS "IMPAIRED" WIPEOUT - EXCLUSIVE: BRITNEY SPEARS NOT INVITED - It turns out Britney Spears never stood ...