Alvin and the Chipmunks: Chipwrecked

Alvin and the Chipmunks: Chipwrecked (also known as Alvin and the Chipmunks 3) is a 2011 American live action/computer animated musical family comedy adventure film directed by Mike Mitchell. It is the third live action/animated film starring Alvin and the Chipmunks following the 2009 film Alvin and the Chipmunks: The Squeakquel, which was a sequel to the 2007 film Alvin and the Chipmunks. The film stars Jason Lee, David Cross, and Jenny Slate (in her Hollywood film debut) with the voices of Justin Long, Matthew Gray Gubler, Jesse McCartney, Amy Poehler, Anna Faris, and Christina Applegate. It was distributed by 20th Century Fox and produced by Fox 2000 Pictures, Regency Enterprises and Bagdasarian Company. The film was released on December 16, 2011 and grossed $343 million on an $80 million budget. A fourth live action/animated film, Alvin and the Chipmunks: The Road Chip, was released on December 18, 2015.

Plot
For a vacation, Dave and the Chipmunks (Alvin, Simon and Theodore) and Chipettes (Brittany, Jeanette and Eleanor) go on a cruise ship heading for the International Music Awards. The Chipmunks and the Chipettes end up creating trouble, ending up with Dave grounding them to their room, only for them to escape to the casinos. Dave notices that his old boss, Ian Hawke is working as the ship's safety monitor dressed as a pelican, and is out to inform the captain if the Chipmunks and Chipettes cause more problems. Alvin goes para-sailing on a kite but the kite flies away with him and the other Chipmunks. Dave goes on a hang-glider to find them but Ian tries to stop him and they both end up in the Pacific Ocean.

Meanwhile, the Chipmunks find an island and they sleep for the night. Dave enlists Ian's help to find the same island and begin looking for the Chipmunks. The next morning, the Chipmunks go and find food and while doing so, an island castaway named Zoe shows up and sees the Chipmunks and Chipettes for the first time. They then go to Zoe's tree house where Eleanor sprains her ankle and Simon gets bitten by a spider, the side effects including personality changes and loss of inhibition.

The morning after, everyone observes Simon's personality has changed and he has no memory of being Simon; he also thinks he is a French, adventurous chipmunk named Simone. "Simone" becomes attracted to Jeanette but does not take as kindly to Alvin and Brittany. Later, Zoe takes Simone, Jeanette, Eleanor and Theodore to a lake with a waterfall and Simone finds a cave. He returns with a gold bracelet which he gives to Jeanette as a crown. Brittany and Alvin see an active volcano the next day and they decide that they have to leave the island with the others. 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 is assigned a job. When Jeanette and "Simone" go and look for food, "Simone" is knocked unconscious and Jeanette is kidnapped; "Simone" reverts to Simon afterwards.

Everyone finds Simon awake and he cannot 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 forces Jeanette to get the treasure in the cave by tying her to a rope, she reveals that she was never a castaway, but came to the island intentionally to find the treasure, but due to the effects of living alone on the island for years, she has gone mentally insane and is ruthlessly willing to find the treasure at all costs. Alvin and Dave come to her rescue. The island begins to rumble again and Zoe lets go of the rope and Jeanette runs with Dave and Alvin back to the raft. When they reach the log to cross, Dave almost falls.

Alvin and a reformed Ian convince Zoe to help save Dave. They then run towards the raft and escape 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 Simon had given to her. Alvin reconciles with Dave and they are rescued. The Chipmunks and Chipettes perform at the International Music Awards. Ian also starts a new career as a screenwriter by selling a screenplay about Zoe's story to Hollywood, earning him his wealth back and making Zoe famous.

In a post-credits scene, the Chipmunks, the Chipettes, and Dave are on a plane heading back home. Alvin is speaking on the pilot's microphone and tricks the passengers into thinking that the plane's destination is set for Timbuktu. Meanwhile, a stewardess keeps pestering Dave to sit down as the plane is about to take off. Alvin accidentally pushes the food cart, and it hits Dave, leading to him yelling "ALLLLVINNN!!", once more.