he other chipmunks. Dave goes on a hang glider to find them with Ian and they both end up in the ocean. Meanwhile, the six chipmunks find an island and they sleep for the night. Dave enlists Ian's help find the same island and begin looking for the six chipmunks. The next morning, the chipmunks go and find food and while doing so, an island castaway named Zoe (Jenny Slate) shows up and sees the Chipmunks and Chipettes for the first time. They then go to Zoe's tree house and Simon gets bitten by a spider, the side effects include personality changes and loss of inhibition. The morning after, everyone observes Simon's personality has changed and he becomes a French, adventurous chipmunk named Simone. Simone asks Jeanette to dance to Alvin's dismay. Later, Zoe takes Simone, Jeanette, Eleanor and Theodore to a waterfall and Simone finds a cave. He returns with a gold bracelet which he gives to Jeanette. Brittany and Alvin see an active volcano the next day and they decide to leave the island. Theodore and Simone find Dave and Ian and they go to meet with the other chipmunks. They all begin to prepare a raft to get them off the island and everyone was assigned a job. When Jeanette and Simone go and look for food, Zoe kidnaps Jeanette and Simone becomes unconscious. Everyone finds Simone awake and he can't remember anything since the bite. They discover that Zoe has taken Jeanette and they head towards the waterfall. When they approached the tree log to cross, Dave and Alvin decide they'll go and find Jeanette. As Zoe forced Jeanette to get the treasure by tying her to a rope, Alvin and Dave came to save her. The island began to rumble again and Zoe let go of the rope and Jeanette ran with Dave and Alvin back to the raft. When they reach a log to cross, Dave almost falls. Alvin asks Zoe to help save Dave. They then ran towards the raft and escaped the eruption. While on the raft, Zoe apologizes to Jeanette for kidnapping her and forcing her to get the treasure. As a gift, Jeanette gives Zoe the gold bracelet that Simone had given to her. Alvin reconciles with Dave and they are rescued. The Chipmunks and Chipettes perform at the International Music Awards. In the film's epilogue, the Chipmunks, the Chipettes, and Dave are on a plane heading back home. Alvin is speaking on the pilot mike that the plane's destination is set for Timbuktu, accidentally pushes the food cart, and it hits Dave.

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