Robyn Sisman's Perfect Strangers is one of my favourite chick lit books of all time (GREAT ending), and I've been waiting for another book from her for years, so I was thrilled to see there is one coming out imminently (August).
A Hollywood Ending features Paige - a starlet and a diva, who leaves the La La Land of Hollywood to find herself in a serious Shakespearean drama in London. Shocked by the difference and forced to stand on her own two feet for the first time, she begins to experience the real world once more.
Incidentally, this isn't the real cover. The real cover is much nicer, but I can't find it online.