Dean, Zoey - Back in Black

Paperback - Gently Used
A-List Series, Book 5
 
Anna and her friends decide to blow off the senior class trip to Washington, D.C., and head to Vegas for a glamorous three-day vacation.  They check into the ultra-luxe Palms Hotel and the wildness begins before they have a chance to unpack their Tuff Betty carpetbags.  The girls have a tacky Vegas fashion contest, and Cammie pulls a stunt that's outrageous even by Cammie standards.  Then everyone visits a hypnotist-to-the-stars.  While they are spellbound, the gang reveals their deepest, darkest secrets and learns firsthand why Vegas is called Sin City!