Characters Present[]
- Blue
- Joe
- Sidetable Drawer
- Mailbox
- Mr. Salt
- Tickety Tock
- Periwinkle
- Slippery Soap (cameo)
- Shovel (cameo)
- Pail (cameo)
- Magenta (cameo)
- Green Puppy (cameo)
- Orange Kitten (cameo)
- Purple Kangaroo (cameo)
- Duck (cameo)
- Giraffe (cameo)
- Key (cameo; end credits only)
- Moona
- Polka Dots
- Roary
- Frederica
- Boogie Woogie
- Twinkle, Twinkle (only appearance)
- Little Star (only appearance)
- Handy Dandy Journal
- Musical Clues (single appearances)
Celebrities[]
- Toni Braxton
- Macy Gray
- India Arie
- They Might Be Giants
Summary[]
It's Bluestock, an amazing backyard concert, featuring Toni Braxton and Tickety, Macy Gray and Periwinkle, India Arie and Mailbox, They Might Be Giants, which was in the letter, and Blue, Joe, and the guests from their last acts! What will Blue sing? Collect musical clues with Joe and then sing Twinkle Twinkle Little Star in Blue's Room!