To find all 4 beanstar pieces go to Gwahar Lagoon defeat Hermie III and you got your first beanstar piece and later go to Winkle Area of Chuckeheluck Woods get a mini-game in Winkle Colosseum got the Winkle Card to pass for battle Popple to win this bros attacks and you got other beanstar piece next in south beanbean rumble a boo statue and appears a bridge to pass go to down... you finish to harhall studio (S Beanbean) complete this mission and later you got your third beanstar piece later go to yoshi teater but before rumble a koopa in this teater a man explain to find the 7 bean fruits and later this mission you got your last beanstar piece! :)