Austin strains his vocal cords while rehearsing for his demo record, so he goes to see his doctor and learns he has a big decision to make.

Ally gets accepted to a music school and is excited that Austin, Dez and Trish sent in an application on her behalf. Unfortunately, the school is in New York, forcing Ally to decide if she wants to move and leave her friends behind.

Austin gets invited to sing at Jimmy Starr's Halloween Party; Dez and Trish accidentally wipeout Taylor Swift; Ally dresses in Taylor Swift's costume and tries to perform a song with Austin.

Austin, Ally, Trish and Dez travel to Times Square where Austin is booked to perform on New Year's Eve. When they couldn't get through New York City's crowded streets, fate brings the gang together with Jessie and Emma who help them get to the top of the building to perform by flying them in a helicopter.

The Austin & Jessie & Ally All Star New Year crossover continues on Jessie S02E06 Nanny in Miami (II).

Austin, Ally, Trish and Dez are excited to make their first big budget music video, but when Kira, a girl with terrible breath, gets hired to play Austin’s love interest, the gang must find a way to finish the video without hurting Kira’s feelings.

When Ally’s mom comes home to host a book release party, Ally works up the courage to finally conquer her stage fright and performs a duet with Austin at the event.

After talking to her mom and Trish about Austin, Ally decides to focus on her music career now that she’s conquered her stage fright. Meanwhile, Austin is unsure about his friendship with Kira.

After Austin, Ally, Trish and Dez find a magical typewriter, it falls into the hands of a thief named Chuck, who uses it to mess with Austin and his friends, doing things such as switching their bodies, making Austin be unable to dance, etc. Will Team Austin be able to stop Chuck before he ruins Austin's career?

Ally is asked to be on a magazine cover, so she goes to Tranquility Spa, where Trish works. But when Trish isn't very good at her job, Ally may be humiliated. Meanwhile, when Dez tries to outdo Chuck in a chilli-making contest, Austin loses Ally's grandma's special necklace.

Jimmy signs his daughter, Kira, as the newest recording artist to his label. When Kira has her first performance, she wants to sing one of Ally's songs, but Ally wants to sing it herself; Austin accidentally records over one of Kira's demos.

After being electrocuted from breaking an advanced instrument for the future, Austin is transferred to the future and learns why the regular way of writing songs is important. He then, gets electrocuted again going back in the present day and tells his friends.

Spirit Week at school prompts Austin to join the Varsity basketball team.

Ally, Trish and Dez prepare to join Austin on his first national tour. However, after performing as his opening act in Miami, Ally receives an offer to help launch her own music career and is faced with the difficult decision of staying behind or joining her friends on tour.

The gang imagines how their lives would be if they’d never met Austin.

Austin and Ally's relationship hits another road block when his music label forces him to hide their relationship from the public. Meanwhile, Dez contemplates moving to L.A. in an effort to be closer to his girlfriend and attend film school.

Desperate to perform again, Austin begins singing at a karaoke club in disguise. Back at the A&A Music Factory, Ally mentors a student with stage fright.

The gang prepares for the A&A Music Factory's first showcase and Austin wants to surprise Ally by teaching their students one of her songs.