This episode of 'Glee' is all about the master of motown Stevie Wonder and includes all his classic songs transported into the pop-tastic world of the glee club. Prepare yourselves for seven 'Wonder-ful' songs and two guest stars.

Rachel (Lea Michele) calls Mr. Schuester (Matthew Morrison) to tell him about her call back to audition for 'Funny Girl.' He is excited for her and she thanks him for his help in making her be all that she can be. After her phone call, he starts to tear up.

Inside the glee room, Will starts announcing all the wonderful news, about Rachel's audition, Britney (Heather Morris) getting early acceptance at MIT, that he re-proposed to Emma (Jayma Mays) and she sad yes and that Tina was weight-listed at veterinary school. As a result of all the great news, the theme of the week is Wonder-ful and the songs of Stevie Wonder.

Artie (Kevin McHale) is depressed about something and Kitty (Becca Tobin) wants to know why. After some prodding, he tells her he got accepted into the Brooklyn Film Academy but asks Kitty not to tell anyone. He tells her his mother doesn't want him to go to New York because she's worried about him.

Back in New York, Kurt (Chris Colfer) is nervously packing to go back to Ohio to see how his dad's test results turned out. While packing he talks about his recent struggles with OCD. He arrives at McKinley High and is greeted by Blaine (Darren Criss), Mercedes (Amber Riley) and Mike (Harry Shum Jr.).

Kitty sings 'Signed Sealed Delivered (I’m Yours)' and after she's done says the song is for Artie who was accepted into film school. Everyone is excited but Artie is upset she lied to him and leaves in a huff. After the hubbub dies down, Mercedes announces that Mr. S. brought her there to be the club's new vocal coach.

At the local coffee shop, Blaine is excited about the legalization of gay marriage in New York, Mercedes talks in excitement about her upcoming music video and Blaine notices that Kurt's OCD is showing. Mercedes assures Kurt that his dad is going to be fine.

At NYADA, some kids warn Rachel about her competition to play Fanny Brice and that she better hope no one tells Cassandra July (Kate Hudson) because she's looking for any reason to get Rachel expelled. After speaking to her, they rush to Cassandra and confirm that Rachel is trying out for the part.

Mercedes talks to the glee club and tells them they lost Sectionals because of fear. To practice for the upcoming competition they sing 'Superstitious.'

In the hallway, Mercedes approaches Jake (Jacob Artist) and tells him he's a triple threat. She then tells him he's going to show off his dancing in her music video.

Kurt is waiting with his dad (Mike O'Malley) to find out his test results. The doctor eventually shows up and tells them the tumor is gone and the Mr. Hummel is now in remission. Everyone celebrates.

The next day, Kurt's dad comes to the glee room to hear his son perform a song for him. In tribute of his father, he sings 'You Are the Sunshine of My Life.'

Cassandra approaches Rachel who is practicing for her audition when she tells her that her call back will interfere with her dance midterm. After Rachel begs to get the date moved, Cassie says she will change Rachel's midterm to tomorrow so she can see her choke at her audition in front of Barbra Streisand which will apparently be a pleasure.

Mike invites Jake to show off his dancing skills to the other kids and they perform 'I Wish' together.

Mercedes gets off the phone with her producer who has told her her album has been taken off the release schedule because she didn't show enough skin on her album cover. She is given the ultimatum that she either re-shoots the cover or they will find another girl to be on the cover for her and they will use Mercedes voice in place of the new girl's.

Artie arrives home to find Kitty talking to his mother (Katey Sagal) and she calls him out on lying. Apparently Artie's mom doesn't care if he goes to New York or not. When Kitty leaves they discuss why he lied and Artie admits that he's afraid of the future and moving away. After a mother-son talk he decides he's going to go and live out his dreams.

Cassandra walks Rachel to her dance midterm but when Rachel arrives it's full of other dance students. As Cassandra explains, they are there to get her through her midterm because at NYADA you are ultimately family. The room erupts in cheers and they brandish signs supporting Rachel in her upcoming audition. Cassandra sings ‘Uptight (Everything’s Alright)’ to an overwhelmed Rachel.

In the glee room, Mercedes says she gave up her record deal in order to stay true to herself. However, she still got a record out of it which she plans to sell on her own. To celebrate staying herself, she performs 'Higher Ground.'

Blaine and Mr. Hummel meet in the auditorium. Blaine gives him a rainbow pin in support of gay marriage and Mr. H. says he will wear it proudly. With that out of the way, Blaine says he would like his permission to ask Kurt to marry him in a bid to win him back. Mr. Hummel sits Blaine down and reminds him they're still just kids and if they love each other there's no need to rush into anything.

Artie tells the group that they need to start performing every song they sing with passion. In response to his announcement, he invites them to a special performance in the auditorium later in the day.

Rachel thanks Cassandra for the congratulations performance with a present she found at a local flea market. Cassandra says that the musical number was a tradition but Rachel says it was for the entire year, for challenging her to become a better dancer. When Rachel admits she's nervous for her audition, Cassandra says not to be because she'll get the part. They hug.

Blaine takes Kurt aside in the hallway and ask him to stay around for Regionals. He says he will and they head to the auditorium where Artie and the New Directions sing 'For Once in My Life.'