Simon has decided that diva week calls for a Mariah Carey song, so he's having Fifth Harmony do "Hero." We see them all talking about how well they've blended, while making pancakes at the contestants' mansion as a single unit. Get it? Blended? So there they are in their white outfits singing the song, and this is one of those performances by them that relies more on passing the lead back and forth than the harmonies. And they actually pull it off, mostly. L.A. says they struggled at the beginning but it turned great and he's happy for them. Britney says Simon's doing a great job with them, and Demi said she expected to be bored but wasn't. Simon generously says to them, "Maybe this isn't a one-horse race." Gosh, Simon, who would that other horse be?

Up next is Carly Rose Sonenclar. During her mentoring session, Britney asks Carly about her emotional moment at the end of last week's performance, which was apparently about both her parents being there. We see her dad being supportive, and then Britney breaks the news that she's making Carly sing "My Heart Will Go On." Carly somehow doesn't run screaming from the room. Instead, she ends up singing on a stage surrounded by ruined chandeliers and sounding eerily like... Beatrice Miller. Except Beatrice sang a whole song in the slow, sad mode that the Titanic song famously leaves behind, and Carly blows it out. Advantage: Sonenclar. Again. L.A. turns to Britney and reluctantly says they could be looking at the winner. Demi doesn't actually get how Carly could be so good. Simon takes it further, saying he doesn't believe she's a human being, because you can't do that at thirteen. Britney tells her how proud she is, and when Mario and Khloe ask if she has anything to say to her parents, she of course thanks them and says she loves them. Good, now she doesn't have to say it in private to them later.