Diva-Offs are face-offs between a number of "divas" for any number of reasons. They can be either impromptu or planned, and have been featured in all five seasons of Glee. They can be referred to as sing-offs, or mash-offs if the divas decide to sing a mash-up.
Season OneKurt Hummel protested against the solo of Defying Gravity being given to Rachel Berry without an audition. After an official complaint from Kurt's father, Burt, Mr. Schuester decided to have a Diva-Off between Kurt and Rachel to decide who would be showcased. To decide the winner, both would sing the song separately for New Directions, the club members voting on who they believed sung the selection more skillfully. Ultimately, Kurt botched the High F purposefully in order to spare his father the homophobic attacks he would receive due to his son singing a song traditionally sung by a girl. Rachel was declared the winner, although Defying Gravity wasn't sung on screen again.
Season TwoSue who storms in and orders them to shut up, leaving the Diva-Off at a draw. Sue, determined to destroy the Glee club from within, spreads lies to Mercedes and Rachel, telling each that the other had said slanderous things about her. The girls, angry with each other, declare a Diva-Off. Rachel lays down the ground rules that the song has to be from Broadway, giving her a home-field advantage. The two sing Take Me or Leave Me, both hostile before the song evolves into a tone of friendship. As the song ends, Mercedes and Rachel are hugging and laughing with each other, leaving Sue baffled.
Maria-OffSince the directors couldn't decide on who to cast for the role of Maria in their school-production of West Side Story, either Rachel or Mercedes, they decided to have a callback. Both sing Out Here On My Own within the scope of that, and the directors decide to double-cast the role of Maria. However, Mercedes resigns, leaving the role to Rachel.
On a mission to discover what Sebastian had put in a slushie to cause Blaine to have surgery, Santana confronts him at Dalton. When she questions him he feels that she is questioning his honour and he challenges her to a duel.They begin to perform Smooth Criminal with cellos backing them up. By the end Santana says to him "I was better." Sebastian replies with "not even close." She then demands for him to tell her what was then the slushie. He admits it was rock salt and it was meant for Kurt. He then slushies Santana.
"The New Rachel"After Jacob Ben Israel asks the question to the remaining New Direction members on who will be 'The New Rachel', too varying opinions. The inclusion of Unique pushes Blaine to announce that they will have a diva off after he declares that "Unique will be the new Rachel." As they meet Tina sets the rules that who ever sings Call Me Maybe the best, as decided by Artie, will be the lead vocalist. All four give their own spin to the song and as it continues on, the need to be the focus has them pushing each other to be seen. After a nearly a week to decide, and an inclusion of an online poll, Artie tells New Directions that Blaine won the title, Brittany being a close second.
After Rachel won the NYADA winter-showcase in Swan Song, Rachel has become really full of herself. Kurt becomes so annoyed by that behavior that he challenges her to a diva-off. Rachel is sure she would win, since she won their diva-off in Wheels, but then Kurt reveals that he lost on purpose back then. Rachel is crushed, since it had raised her confidence a lot back then. They then compete against each other at a public NYADA event. Due to Rachel's insufferable attitude, more people favored Kurt's performance, so he was announced the winner of the competition.Rachel becomes discouraged by her loss, and doesn't want to audition for an upcoming musical any more, thinking that she will become too bigheaded if she becomes successful. She needs to be build up by Kurt again after that.
Season FiveKitty doesn't really love Artie and is just using him. Although it starts well, the song is sharply interrupted when Tina accidentally pushes Artie off his wheelchair, which leads him to leave the Choir Room angry. Fondue For Two, Rachel and Mercedes realize that they plan to sing the same song to glee club. Continuing their feud, both are adamant that it is 'their' song, and so Rachel suggests a "good, old fashioned diva-off" to settle the score. Mercedes happily agrees.
Annual Boys vs. Girls Mash-Offs
Every year (and Season) a Mash-Off between the New Directions Boys and the New Directions Girls. A mash-off is a kind of diva-off where both teams are required to sing a mashup. In Season Three, the off was between New Directions and The Troubletones, but it can be considered am equivalent since the Troubletones held three then former New Directions Girls. and New Directions only had Tina and Quinn because Rachel had been suspended. Up to now, there has never been a winner of these mash-offs.
Season OneThis mash-off was held as a competition to heat up the Glee Club because they had been lazy after knowing their competition for Sectionals wasn't very hard to beat. The incentive of the competition would be having power of decision over the showstopping number at Sectionals. But there was trouble when both teams went to the then school nurse Terri for help and they were given vitamins to improve their performances (first to the boys and then the girls). They would have probably had a draw, but Rachel and Finn decided to tell Mr. Schue the truth, having both teams disqualified and Terri fired.
Season TwoThis mash-off wasn't held as a competitive off. The assignment (apart from singing a mashup) was the girls had to sing music the boys liked and vice versa. Since this off wasn't competitive, there wasn't a winner.
Season ThreeThis is a Glee club mash-off Will (coach of New Directions) and Shelby (coach of The Troubletones) put together as a way of sane competition between Glee Club, but Santana and Finn get a lot more competitive. It is unknown if a winner has been chosen and, if there has, who it was.
Season FourThis is the only mash-off not held in the Season's sixth episode, but in the fifteenth. The theme was movie songs and it was held to see which team would star in Artie's future movie. The winner is declared to be everyone (much to the Glee Club's dissent) because Artie needed a lot of fresh faces in his upcoming project.
- The character that has taken part in the most Diva-Offs is Rachel.
- The most recurring rivalries are Rachel vs. Kurt and Rachel vs. Mercedes (2 Diva-Offs were held for each).
- Ironically, the three of them have a Diva-off in 100.
- Kurt is the only characters to have ever officially beaten Rachel in a Diva-Off.
- Season Two and Season Four had their first Diva-off in their first episode (Rachel vs. Sunshine in Audition and The New Rachel-Off in The New Rachel), which is the earliest a season had its first off.
- All of the Boys vs. Girls Mash-Offs were judged by Will and a Special Guest Judge.