Strange accents in pop music

Should it? Doesn't it depend on the context? e.g. 'Just You and I (and Everyone Else Wants To Turn Off this Bloody Song)'

Hmm, in the lyrics, it's "You and I could take over the world/Just you and I". So "You and I could take over the world" is correct, but you wouldn't say "I could take over the world/Just I", would you?