The Music Jam 2021 was a party in CP3D. It was confirmed in issue #42 of The Penguin Times. Construction started on June 15, 2021, and the party began on July 1, 2021. It ended on July 13, 2021.
The entire island had a sunset sky, and several rooms were decorated. The Penguin Band also performed at the Iceberg. Cadence made her first appearance on the island during this party.
For items available from the Snow Forts and Back Stage, see Shirts Rock Catalog and Music Catalog.
- This was the first party to have an animated logo.
- A picture of TheWilliam could be seen in the Pizza Parlor.
- This party marked the first time the Mine had full-fledged decorations.
- At the same time this party released, the Purple Puffle became available at the Pet Shop.
- All the minigames that take place outside, with the exception of Card-Jitsu Fire, had the sunset sky, and several minigames had music themed decorations.
- In Bean Counters, the fish were replaced with guitars. A jam jar labeled "Music Jam" and a guitar can be seen in the corner.
- In Ice Fishing, the barrels were replaced with speakers. A guitar can be seen lying against the tree.
- In Hydro Hopper, the beach balls were replaced with disco balls.