When Nick writes a love song for a girl he likes, his brothers try to convince him that he's moving to fast. Meanwhile, after something leaves the boys stripped of their stage costumes, Stella finds a way to stop it from happening again.
The boys plan an awesome surprise for their mom's birthday. While making part of it the home movies are ruined. To make it up to their mom the boys decide to surprise her with new home movies.
Joe, Nick and Kevin develop a crush on the delivery girl from Picarillo's pizza, and each try to make an impression to win her over.
Hundreds of adoring fans surround a thrift store which the guys slipped into to avoid them.
The brothers find out an old friend's visit is mainly to use their fame for his advantage. Meanwhile, Macy believes her potato chip resembles Joe.
The band is put in an awkward position after a talentless Macy auditions as a backup singer for their next album. Meanwhile, Frankie designs a t-shirt for the band, but used his own face.
Stella commits a crime of fashion after Joe ruins her chances of going out with a popular jock.
Joe develops a crush on a cello player who dislikes rock stars, so he decides to play the triangle in the orchestra. Nick and Kevin try to help Joe by also joining the orchestra. Meanwhile, Macy and Stella have a bet on who can go longest minus their so called obsessions: Macy can't say JONAS and Stella can't text.
Part of Nick's really bad day includes a bad case of writer's block. While asleep he dreams he has written a great song, but when Nick awakens he can't remember it, causing Joe and Kevin to try and recreate Nick's bad day to help him remember.
Joe becomes cautious around Stella after his brothers suggest that Stella wants to be more than friends with him after she keeps asking Joe to hang out with her a lot. Macy is thrilled that Randolph wants to take her on a date, but he begins to regret asking her when she tries to turn him into a Nick Lucas look-a-like.
Kevin, Joe & Nick audition for play "The Three Musketeers" and land the lead roles, but then Joe gets stage fright and he decides to drop out of the play. Joe immediately regrets his decision as he becomes very jealous of Stella's crush on the school jock Van Dyke Tosh, who replaced him as the third musketeer in the play. Meanwhile, Macy loses her good luck charm and she thinks it is the reason behind her losing streak.
Joe is linked by a magazine with a celebrity named Fiona Skye (Sara Paxton). When Fiona begins to follow Joe, he and his brothers realize that something must be done.
Joe's classmate Abby is unfairly punished for an accident with a fire alarm at school that they both had a part in and he is determined to make it right.
For their 15th Friendship Anniversary, Joe suggests throwing a party for Stella and enlists the help of Macy. The time Joe and Macy spend together makes Stella suspicious and jealous, and she believes that the two are dating. Meanwhile Nick and Kevin bet who's better at Hackeysack and Kevin takes a kung-fu twist to the competition.
Kevin, Joe and Nick are left home alone for a week. They try to behave and impress their parents, but when Frankie throws a party, their plans go into a tailspin. Meanwhile, Stella unwittingly "takes control" of the JONAS fan club from Macy.
Kevin thinks there is a ghost in the firehouse so he enlists Stella, Joe and Nick to help find it.
Joe, Nick, and Kevin forget Stella's birthday so they try to plan a party for her but schedule it at the same time as a "big interview".
Van Dyke asks Stella on a date to El Meat, a new, all-meat restaurant. A jealous Joe crashes the date with Macy. Kevin has an addiction to Nick's cookies and Nick tries to teach Kevin about self-control.
Kevin's old girlfriend, Anya, joins their school, but the kids in the school make fun of her because they find her eccentric. Meanwhile, Joe, Nick, Stella and Macy try to find out who has been taking picture of Jonas and uploading it on Macy's website
The boys judge a beauty contest. Stella decides to be part of the contest.
As the JONAS World Concert Tour draws closer, Joe and Stella come to terms with being apart from one another over the summer. Meanwhile, Kevin and Joe devise a plan to help Nick ace his geometry test after their dad threatens not to send the brothers on tour unless they pass all of their school exams.
