Hi-5 is planning a surprise party and everyone is invited! Stevie, Casey, Fely, Lauren and Tim want to do something special for their wonderful friend Chats' birthday. So, they are throwing her a party. It's a big, fun-filled surprise with lots of singing, dancing and party games. Get ready to yell "surprise!" and join in with the celebration. Hi-5 Surprise! is the biggest party to ever hit the stage ... but remember don't tell Chats!