You can bet on that

Summary: "Jamie, Isabella, and Angeline have known each other for a long time. They've even become friends, whether Jamie likes it or not. But when the trio starts a friendly competition, all bets are off. The loser will be treated to a game of Dare or Worse Dare...with Isabella. (And Jamie's pretty sure that's like having a banana-peeling contest with a starving monkey. The monkey always wins.) What could go wrong? Probably everything. And it's probably all that blondwad Angeline's fault. Probably. Jamie still has no idea that anyone is reading her diary, so please, please, please don't tell her" --from publisher's web site.