[Shaun]

assuming they aren't literally going to all do reggaeton and dancehall songs like an actual carnival (although I'd piss myself if they did)...

Jack & Joel - "On the Floor" (Jennifer Lopez/Pitbull)
The Cutkelvins - "Reggaeton (Lento)" (CNCO/Little Mix)
Rak Su - "Despacito" (Luis Fonsi/Daddy Yankee) (obvious choice)
Grace - idfk a slow cover of "Nobody Wants to Be Lonely" (Ricky Martin/Xtina)
Rai-Elle - "Havana" (Camila Cabello)
Alisah - "Fantasy" (Mariah Carey) (the music video is at a carnival, OK)
Holly - "Lola's Theme" (Shapeshifters)
Sam - "Jump in the Line" (Harry Belafonte)
Leon - "Subeme la Radio" (Enrique Iglesias/Matt Terry/Sean Paul)
Kevin - "Smooth" (Santana/Rob Thomas)
Matt - "Hero" (Enrique Iglesias) (the theme is supposedly 'carnival/latina' so they'll fob him off with an Enrique song and style him to be half-shirtless)
Tracey - "Red Alert" (Basement Jaxx)

haven't a clue what Lloyd or the Irish kids will do.

there that's the best i can do with this silly theme. if it were up to me i'd force all of them to do different versions of the Macarena on Saturday, and Shakira's "Waka Waka (Time for Africa)" on Sunday.