Backstage, Khloe talks to Fifth Harmony (actually just Ally) and Diamond to kill some time before Simon gets to introduce Emblem3 singing "Forever Young." Not the Bob Dylan or Rod Stewart version, either. Simon has apparently taken Demi's criticism of their unimaginative choreography to heart, because he has them switch places a few times so the one singing lead is usually in the middle. And they also jump off the upper level of the stage to the lower level at one point. Kinetic! L.A. tells them he thought they were great when they first showed up, but "tonight you nailed it." Britney calls it a "superstar performance." Glad they enjoyed it. Demi maintains that she's a fan, but wants them to command the stage more. Simon dismisses that as silly and insists they were really good tonight. "Emblem3 have landed." Well, what goes up must come down, and not always gracefully. Then there's some banter about which one of the boys Demi has a crush on (not that she's saying) which makes me wish the commercials had started a lot sooner. And probably Demi, too.
Britney stumbles through her second intro of Carly. She's singing "If I Were a Boy," sounding a lot like it's still acoustic week, although the fans have apparently decreed the construction of a series of stone arch bridges for her projected background. And they clearly insisted on having her put in as many big, long, loud notes as she could comfortably throw in, and then an additional one right at the end. L.A. says he's nervous about her as a mentor, but loves her as a fan. Demi agrees that Carly's awesome, but wants to hear something up-tempo from her. Because it went so well the last time she tried that. Simon advises Carly not to listen to a word Demi says, although he says it was an odd lyric from her (prompting Demi to interrupt him again, unrepentantly), and Mario tells Carly about a sign he saw earlier saying "Carly is Gnarly." Which she seems to take as a compliment. Khloe reminds the judges that the Pepsi Challenge song was chosen by the fans, because we haven't heard enough passive-aggressive defensiveness from everyone on that score already.
When we come back, both hosts are in the audience before Simon announces that for Fifth Harmony, the fans have "annoyingly" picked a song by Demi Lovato, "Give Your Heart a Break." Looks like the fans wanted Ally's nerd-glasses back this week, too. Most of the judges appear impressed with this performance, which seems to include some actual harmonies. L.A. emotes mock-surprise at that, and adds that it was their best. "A friend of mine does this song very good and so did you guys," Britney [sic]s. Demi gushes in agreement (probably kvelling internally that Britney may possibly have just referred to her as a friend), and admits that Simon "actually did a good job this week," but remembering to point out that the fans picked it. Simon takes credit for shortlisting the song in the first place and says everyone needs to vote for Fifth Harmony because the show wouldn't be the same without them. Well, if he says so.