Alvin has a harmonica solo at the famed carnegie hall. But there is a slight problem-- Alvin has given his harmonica to a sick boy!

For the first time The Chipmunks meet their female counterparts, The Chipettes: Brittany, Jeanette and Eleanor.

A charaltan chipmunk named Harry claims to be Alvin, Simon and Theodore's long lost uncle and says he will have them see their mother as soon as they make enough money. The Chipmunks later not only find out that Harry is not their uncle but also the money he has them making is for a carnival strongman who he has owed for a long time.

Alvin tells a girl he wants to impress that they are famous and that they are going to be starring in a rock concert on live t.v., but Alvin must convince the producer to let him play.

Alvin unknowingly assists a jewel thief steal some jewelry from a cabin on their cruise ship, and Simon and Theodore begin to investigate the crime.

The origin of the Chipmunks is revealed, including how Dave ended up with the Chipmunks in the first place, as well as how their musical career got started.

The Chipmunks meet their grandparents for the first time. Then, when they discover that someone is trying to take over their Grandparents farm, they decide to raise the money needed to save the farm.

Alvin, Simon, and Theodore go in search for a mother to attend their school picnic. Each choose the person, that they each think Dave will like best. But, when all three of their choices arrive at their house, Alvin, Simon, and Theodore, will do anything to make sure that their choice wins.

The boys enter a contest so that they can win a chance to sing with Dolly Parton. But, the only way they can win is if they are from Nashville. The boys enter the contest anyway, but make an enemy when they win. The person who got second place in the drawing is determined to prove that the Chipmunks aren't from Nashville, and win his chance to sing with Dolly Parton.

Dave has a nightmare of himself getting smaller and smaller.

Alvin loses his memory and thinks that he is an angel.

Dave hires a nanny to take care of the Chipmunks when he is away at work, and the Chipmunks will do anything to get rid of her.

The Chipmunks invite a boy to stay with them who is a ballet dancer, and when a bulley begins to torment Alvin, he shows the bulley that ballet is cool.

Alvin demands a short trip away from obsessed fans who begin following him everywhere he goes. So, the Chipmunks go for a picnic out in the woods, only to be found again by their fans. Alvin runs off into the woods, and runs into a wild chipmunk. He decides to change places with the chipmunk, and he stays in the chipmunk's tree, while the wild chipmunk takes his place. All goes well until the real Alvin is caught by a hunter that holds him hostage. Simon, Theodore, and the wild chipmunk must save Alvin before it's to late.

Dave drags the Chipmunks unwillingly on a camping trip in the great out doors. When they finally arrive, the Chipmunks discover large footprints and think they are being followed by Bigfoot. Eventually they build a treehouse for Dave, when he falls and injures himself badly, and Alvin and Simon go in search for Big Foot.

Charlatan chipmunk Harry returns and this time pretends to be Santa Claus and cons Alvin, Simon and Theodore into building a Christmas-themed amusement park called ""Santa's Place"".

Alvin donates money to an animalfund raiser, and discovers that they don't have any money. In, an attempt toearn some money, they decide to sell the cookies that Theodore spent their, money on. But, when the Chipmunks find a dog, they must hide it from Dave.

The chipettes move to the Chipmunks school and Alvin and Brittany run against each other for class president. Both will stop at nothing to win, but when the polls are revealed they discover that Jeanette has the deciding vote.

The Chipettes are looking forward to be spending Valentine's Day with the Chipmunks. Simon and Theodore are also looking forward in spending the day with them, except Alvin. He is afraid of being crushed again due to the fact that a girl he once had a crush on broke his heart on Valentines. In order to rebuild his confidence, Simon makes a tape for Alvin to listen to while he sleeps. Without realizing, the tape hypnotizes Alvin into believing he is a Casanova named Captain Chipmunk while sleepwalking and is finally able to gather up the courage to ask Brittany... although once he awakens, he cannot remember. So, once he finally gathers the courage to ask her, she rejects him, since she has already been invited by the wonderful, dashing, charming Captain Chipmunk. But of course, the special ends with both Alvin and Brittany finally going together and being voted King and Queen Valantine.

While the Chipettes volunteer at the local hospital, a terrified tonsillectomy-bound kid goes missing, so until Brittany finds him, Theodore must step in to substitute, but the doctors, thinking he's the kid, take him into surgery.

Alvin makes a bet with Brittany to see if he could make anyone into a beauty pageant winner. The challenge gets interesting when Jeanette is the girl he has to transform into beauty pageant material.

When they can't determine when their birthday is, the Chipmunks set out to find their mother, Vinny, who abandoned them as babies.

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The Chippette's are reunited with their old Austrailian friend Olivia, which prompt's the singer's to remember their younger days when they were just little tiny chippete's not trying to have a career, only trying to survive.

The Chipette's successfully make their way into the U.S.A., yet they find out the hard way that getting there is only half the battle. After taking various odd jobs in middle management, the Chipette's travel across the continent to California. There the girls manage to find a famous record producer who after hearing their first song, gives the Chipette's the break they were looking for. The rest of course, is history.

Dave meets a woman he really feels a strong connection with. At first the boys disagree, but finds she can get along with all of them. The only thing preventing this relationship to work is her own three boys clashing with the Chipmunks.

Alvin has a dream that he is a detective from the 40s. He is on a case to find a famous rich girl named Brittany.

All three boys find themselves having a crush on the science substitute teacher. In order to impress her, they each make a project for the science fair.

The boys are fed up with their puppy's antics and set out to train Lilly to behave. But soon the Chipmunks feel they are not qualified to raise her and they give her away.

A girl rejects Alvin because he's too childish. Therefore, Alvin decides to go prematurely adult, and only do grown-up things - and he forces his brothers to do the same! But by reading him the story of Peter Pan, Dave makes Alvin understand what a wonderful adventure childhood can be.

A documentary special look of the Chipmunks' past throughout the decades. Will Smith hosts this special.

Alvin wants to join a gang that is well known for playing pranks on Halloween. One target they wish to pull a prank on is a boy with a deformed face who Theodore befriends.

The Chipmunks celebrate Thanksgiving with the family. They are also involved in a Thanksgiving play. But instead of getting the jobs they normally would be good at, the teacher decides to try something new with them. She gives the job of costume designer to Alvin, set technician to Theodore, and the starring role to Simon.

Alvin finds out that his Grandpa was the original Easter Chipmunk, and tries to sue Mr. Hoppity, the Easter Bunny for the rights.