From besties to worsties and back again . . .Team Avalon:For Avalon, staying on top of trends has never been a problem — until her fellow cheerleaders decide that her BFF Halley is definitely out this season. Now Avalon must choose between the frenemy who embarrassed her in front of everyone or the new friends who stood by her. vs.Team Halley:Halley thinks she's got it all: her forever-friend Avalon, her new bestie Sofee, and the hottest fall wardrobe at Seaview Middle School. Her life is a total YES. But when Sofee spies Avalon flirting with Halley's crush, will it be World War Halvalon all over again?