It's Not Easy Being Mean: Number 7 in series

After getting expelled for VERY bad behaviour on a class field trip, the Pretty Committee is back. But returning to school is a piece of fat-free cake compared to Massie's next goal - finding the key that unlocks an ah-mazing legendary secret room on campus. Alpha eighth-grader Skye Hamilton and her clique have hidden it under the mattress of a mysterious Briarwood boy - but which one? Meanwhile Claire's finding that being famous isn't all it's cracked up to be. Her constant meetings with movie execs are eating into her time with the P.C. and with Cam! Is being a Hollywood starlet worth the Gucci-high price tag?