Glee-Cap: Trio.

Remember that song that said three was a magic number? Well, tonight, Gleeks - three is most certainly a gleeriffic number as the spotlight is full of trios - some trios pair up for a little fun, while others will be fighting it out in usual Glee fashion. It's just another night full of songs, rivalry, and everything we could possibly want. Strap yourself in for a magical episode, Gleeks, because three is spreading its magic all over Glee.

Will and Emma get caught by Becky in a compromising position, and it comes to the surface (when Sue calls them to her office) that they are trying to have a baby. Blaine, Sam, and Tina present "Jumpin, Jumpin" by Destiny's Child to the glee club and it becomes clear that time is ticking between Nationals and graduation, so Mr. Schue tells them to cherish the times and the memories. Rachel turns to Elliot after the fight with her roomies, and in her own Rachel Berry way - takes over his life and his apartment. When Elliot pops by Rachel's rehearsal, the two duet on Heart's "Barracuda" and their new friendship seems cemented. ..Hummelberry, who? Sam and Blaine try on their cap and gowns, which further proves how soon enough their time at McKinley will end, and brings on Tina's constant waterworks. Blaine suggests the idea of a lock-in, so they will have something to remember once time has passed, which is something Tina and Sam jump to do.

Emma and Will come up short on the pregnancy test end, but when Will keeps pushing, Emma gets more and more uncomfortable. Coach Bieste and Sue explain to Will that he needs to calm it down, and stop trying so hard. Sue announces that the lock-in was approved by the student council, but cancels it in her usual Sue way. Tina freaks out, but Blaine and Sam suggest that they have just their own lock in for the three of them, which stops Tina from having yet another breakdown. Elliot stops by to talk to Santana, who gives him some straight up Lima Heights realness about little Miss Rachel Berry. Blaine (in Nightbird mode) leads Sam and Tina in through a choir room window, thus beginning their epic three person lock-in, which of course involves a performance of "Don't You Forget about Me". The fun comes to a halt when the trio is caught by Becky, who might be the best party crasher ever.

Becky brings energy drinks and Twister, but the trio isn't into it, until Becky explains if they don't bow to her whim, she'll call the cops. Will tears down the craft room and begins painting for baby's nursery, which is where Emma finds him, and with his reassurance, Emma calms down. With a little "Danny's Song", Will and Emma relax, and then find themselves in the mood for love. Blaine bails on Becky, only to find Sam and Tina making out, which ruins the "friendly" mood of things. Sam and Tina stumble to explain, but Blaine is having none of it, and flees the scene. Run, Nightbird, run!

Rachel running late for work finds Santana and Elliot running lines, which sends Rachel into Berry diva frenzy, but a performance for a couple celebrating the wife's birthday (psst, her name is Gloria) sends Rachel and Santana into battling mode for Elliot. Who knew "Gloria" from Flashdance could be a great battle number? Elliot removes himself from the situation, leaving Santana and Rachel cold, and Kurt to pick up the pieces. The aftermath of lock-in continues as Blaine rants about wanting the lock-in to be a fun thing for friends, and not have him end up being a third wheel. Despite Tina and Sam trying to explain it was a silly senior year fling, Blaine isn't hearing it, and leaves.

Rachel and Kurt continue to battle it out, with Kurt stuck in the middle, but neither of the divas is listening. Fed up with the diva attitudes, Kurt kicks Rachel and Santana out of Pamela Lansbury in favor of a trio with Elliot and Dani. The diva attitudes continue as Rachel and Santana come to support their friends in their new band, One Three Hill. The brand new trio performs "The Happening" by The Supremes, giving the two dueling divas in the audience a chance to reflect on the mistakes of a certain Supreme. ..Calling Miss Ross, anyone?

Understanding begins to rear its head as Santana and Rachel recall how they really don't have many female friends in their past, but each other. The members of One Three Hill attempt to patch up the former besties, but aren't as successful as the McKinley trio as Blaine, Sam, and Tina patch things up. After excluding Artie the entire time, Blaine, Sam, and Tina include him in their final glee club meeting number - "Hold On" by Wilson Phillips. In New York, the Wilson Phillips spirit is alive in One Three Hill and the dueling divas known as Santana and Rachel.

Will begins packing for Nationals, which will be in sunny Los Angeles, but Emma shocks him when she reveals that she's pregnant.

Next week, the glee club hits LA for Nationals, where the competition is intense --- led by Skylar Astin! Also, in two weeks, Glee will celebrate 100 episodes with remixes and returns of old favorites. Grab some sunblock, and I'll see you for some California Dreaming next week!