Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived... What a blast! Ashley is having a sleepover - and Jennifer Dilber, the most popular girl in school, is coming! Ashley works super-hard to make sure her party will be perfect. She doesn't want any surprises. But she gets a BIG surprise when the girls play Truth or Dare - and Mary-Kate tells Jennifer an amazing secret. A secret she's never even told Ashley...