W hen the Bay Area's first Hello Kitty Cafe debuted, more than 500 customers got in line before its 10 a.m. opening time.

Sanrio has had many amazing and kawaii collaborations over the past several years, but these 10 crossovers need to happen ...

On this page of IGN's Hello Kitty Island Adventure guide, you'll learn more about My Sweet Piano, including what gifts to give her, friendship rewards, quests and more.